./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/watermelon.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/watermelon.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 dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 10:50:46,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 10:50:46,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 10:50:46,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 10:50:46,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 10:50:46,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 10:50:46,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 10:50:46,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 10:50:46,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 10:50:46,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 10:50:46,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 10:50:46,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 10:50:46,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 10:50:46,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 10:50:46,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 10:50:46,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 10:50:46,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 10:50:46,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 10:50:46,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 10:50:46,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 10:50:46,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 10:50:46,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 10:50:46,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 10:50:46,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 10:50:46,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 10:50:46,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 10:50:46,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 10:50:46,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 10:50:46,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 10:50:46,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 10:50:46,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 10:50:46,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 10:50:46,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 10:50:46,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 10:50:46,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 10:50:46,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 10:50:46,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 10:50:46,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 10:50:46,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 10:50:46,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 10:50:46,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 10:50:46,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 10:50:46,321 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 10:50:46,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 10:50:46,321 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 10:50:46,322 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 10:50:46,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 10:50:46,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 10:50:46,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 10:50:46,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 10:50:46,323 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 10:50:46,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 10:50:46,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 10:50:46,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 10:50:46,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 10:50:46,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 10:50:46,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 10:50:46,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 10:50:46,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 10:50:46,324 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 10:50:46,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 10:50:46,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 10:50:46,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 10:50:46,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 10:50:46,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 10:50:46,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 10:50:46,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 10:50:46,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 10:50:46,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 10:50:46,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 10:50:46,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 10:50:46,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 10:50:46,327 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 10:50:46,327 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 10:50:46,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 10:50:46,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 10:50:46,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 [2021-12-17 10:50:46,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 10:50:46,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 10:50:46,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 10:50:46,533 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 10:50:46,533 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 10:50:46,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/watermelon.c [2021-12-17 10:50:46,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f3e2c55/7aebab8bcbe0484bbc2518d432219183/FLAGe58046769 [2021-12-17 10:50:46,940 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 10:50:46,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c [2021-12-17 10:50:46,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f3e2c55/7aebab8bcbe0484bbc2518d432219183/FLAGe58046769 [2021-12-17 10:50:46,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f3e2c55/7aebab8bcbe0484bbc2518d432219183 [2021-12-17 10:50:46,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 10:50:46,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 10:50:46,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 10:50:46,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 10:50:46,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 10:50:46,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:50:46" (1/1) ... [2021-12-17 10:50:46,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14faedcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:46, skipping insertion in model container [2021-12-17 10:50:46,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:50:46" (1/1) ... [2021-12-17 10:50:46,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 10:50:46,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 10:50:47,111 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-crafted-1/watermelon.c[373,386] [2021-12-17 10:50:47,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 10:50:47,131 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 10:50:47,140 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-crafted-1/watermelon.c[373,386] [2021-12-17 10:50:47,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 10:50:47,166 INFO L208 MainTranslator]: Completed translation [2021-12-17 10:50:47,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47 WrapperNode [2021-12-17 10:50:47,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 10:50:47,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 10:50:47,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 10:50:47,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 10:50:47,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (1/1) ... [2021-12-17 10:50:47,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (1/1) ... [2021-12-17 10:50:47,188 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2021-12-17 10:50:47,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 10:50:47,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 10:50:47,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 10:50:47,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 10:50:47,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (1/1) ... [2021-12-17 10:50:47,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (1/1) ... [2021-12-17 10:50:47,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (1/1) ... [2021-12-17 10:50:47,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (1/1) ... [2021-12-17 10:50:47,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (1/1) ... [2021-12-17 10:50:47,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (1/1) ... [2021-12-17 10:50:47,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (1/1) ... [2021-12-17 10:50:47,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 10:50:47,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 10:50:47,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 10:50:47,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 10:50:47,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (1/1) ... [2021-12-17 10:50:47,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 10:50:47,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:47,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 10:50:47,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 10:50:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 10:50:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 10:50:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 10:50:47,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 10:50:47,331 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 10:50:47,332 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 10:50:47,489 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 10:50:47,493 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 10:50:47,493 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 10:50:47,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:50:47 BoogieIcfgContainer [2021-12-17 10:50:47,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 10:50:47,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 10:50:47,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 10:50:47,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 10:50:47,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:50:46" (1/3) ... [2021-12-17 10:50:47,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ece72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:50:47, skipping insertion in model container [2021-12-17 10:50:47,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:50:47" (2/3) ... [2021-12-17 10:50:47,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ece72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:50:47, skipping insertion in model container [2021-12-17 10:50:47,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:50:47" (3/3) ... [2021-12-17 10:50:47,514 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2021-12-17 10:50:47,517 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 10:50:47,517 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 10:50:47,560 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 10:50:47,565 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 10:50:47,568 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 10:50:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 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) [2021-12-17 10:50:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 10:50:47,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:47,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:47,592 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2143149025, now seen corresponding path program 1 times [2021-12-17 10:50:47,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:47,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201435612] [2021-12-17 10:50:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:47,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:47,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:47,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201435612] [2021-12-17 10:50:47,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201435612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:50:47,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:50:47,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 10:50:47,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363463776] [2021-12-17 10:50:47,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:50:47,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 10:50:47,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:47,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 10:50:47,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 10:50:47,898 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 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) Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:48,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:48,097 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-12-17 10:50:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 10:50:48,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 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 [2021-12-17 10:50:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:48,105 INFO L225 Difference]: With dead ends: 68 [2021-12-17 10:50:48,106 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 10:50:48,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-12-17 10:50:48,115 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:48,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 159 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:50:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 10:50:48,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-12-17 10:50:48,145 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) [2021-12-17 10:50:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-17 10:50:48,147 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 11 [2021-12-17 10:50:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:48,147 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-17 10:50:48,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-17 10:50:48,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 10:50:48,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:48,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:48,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 10:50:48,151 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash -906524851, now seen corresponding path program 1 times [2021-12-17 10:50:48,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:48,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209439847] [2021-12-17 10:50:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:48,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:48,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:48,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209439847] [2021-12-17 10:50:48,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209439847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:50:48,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:50:48,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 10:50:48,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102785588] [2021-12-17 10:50:48,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:50:48,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 10:50:48,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:48,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 10:50:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 10:50:48,203 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:48,220 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-12-17 10:50:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 10:50:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2021-12-17 10:50:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:48,223 INFO L225 Difference]: With dead ends: 35 [2021-12-17 10:50:48,223 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 10:50:48,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 10:50:48,228 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:48,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:50:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 10:50:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-12-17 10:50:48,234 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) [2021-12-17 10:50:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-17 10:50:48,242 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-12-17 10:50:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:48,242 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-17 10:50:48,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:48,242 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-17 10:50:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 10:50:48,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:48,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:48,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 10:50:48,243 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1897717841, now seen corresponding path program 1 times [2021-12-17 10:50:48,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:48,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519541657] [2021-12-17 10:50:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:48,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:48,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:48,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519541657] [2021-12-17 10:50:48,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519541657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:50:48,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:50:48,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 10:50:48,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614267630] [2021-12-17 10:50:48,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:50:48,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 10:50:48,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:48,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 10:50:48,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 10:50:48,283 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:48,298 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-12-17 10:50:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 10:50:48,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2021-12-17 10:50:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:48,299 INFO L225 Difference]: With dead ends: 48 [2021-12-17 10:50:48,299 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 10:50:48,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 10:50:48,300 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:48,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:50:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 10:50:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-17 10:50:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 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) [2021-12-17 10:50:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-17 10:50:48,304 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 13 [2021-12-17 10:50:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:48,304 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-17 10:50:48,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:48,305 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-17 10:50:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 10:50:48,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:48,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:48,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 10:50:48,306 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash 983883823, now seen corresponding path program 1 times [2021-12-17 10:50:48,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:48,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663658925] [2021-12-17 10:50:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:48,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:48,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:48,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663658925] [2021-12-17 10:50:48,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663658925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:48,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797904302] [2021-12-17 10:50:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:48,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:48,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:48,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:48,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 10:50:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 10:50:48,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 10:50:48,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 10:50:48,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797904302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:50:48,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 10:50:48,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-12-17 10:50:48,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030673039] [2021-12-17 10:50:48,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:50:48,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 10:50:48,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:48,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 10:50:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:50:48,654 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:48,726 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-17 10:50:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 10:50:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-17 10:50:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:48,728 INFO L225 Difference]: With dead ends: 44 [2021-12-17 10:50:48,728 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 10:50:48,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-17 10:50:48,729 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:48,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:50:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 10:50:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-12-17 10:50:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-12-17 10:50:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-17 10:50:48,733 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2021-12-17 10:50:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:48,734 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-17 10:50:48,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-17 10:50:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 10:50:48,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:48,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:48,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 10:50:48,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:48,954 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:48,954 INFO L85 PathProgramCache]: Analyzing trace with hash 891572815, now seen corresponding path program 1 times [2021-12-17 10:50:48,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:48,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537494698] [2021-12-17 10:50:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:48,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:48,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537494698] [2021-12-17 10:50:48,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537494698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832243622] [2021-12-17 10:50:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:48,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:48,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:48,991 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:48,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 10:50:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:49,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 10:50:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:49,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:50:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:49,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832243622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:50:49,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:50:49,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-17 10:50:49,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156651008] [2021-12-17 10:50:49,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:50:49,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 10:50:49,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:49,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 10:50:49,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-17 10:50:49,128 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:49,149 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-12-17 10:50:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 10:50:49,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 15 [2021-12-17 10:50:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:49,152 INFO L225 Difference]: With dead ends: 50 [2021-12-17 10:50:49,153 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 10:50:49,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-17 10:50:49,154 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:49,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:50:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 10:50:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-12-17 10:50:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-17 10:50:49,160 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2021-12-17 10:50:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:49,160 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-17 10:50:49,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-17 10:50:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-17 10:50:49,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:49,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:49,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 10:50:49,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:49,384 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash 353844429, now seen corresponding path program 2 times [2021-12-17 10:50:49,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:49,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084138852] [2021-12-17 10:50:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:49,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 10:50:49,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:49,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084138852] [2021-12-17 10:50:49,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084138852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:50:49,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:50:49,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 10:50:49,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687370127] [2021-12-17 10:50:49,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:50:49,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 10:50:49,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 10:50:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 10:50:49,490 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:49,519 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-12-17 10:50:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 10:50:49,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-17 10:50:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:49,521 INFO L225 Difference]: With dead ends: 34 [2021-12-17 10:50:49,521 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 10:50:49,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:50:49,524 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:49,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:50:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 10:50:49,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-17 10:50:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-12-17 10:50:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-17 10:50:49,530 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-12-17 10:50:49,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:49,530 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-17 10:50:49,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:49,531 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-17 10:50:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 10:50:49,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:49,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:49,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 10:50:49,531 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1453414625, now seen corresponding path program 1 times [2021-12-17 10:50:49,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:49,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346675086] [2021-12-17 10:50:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:49,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 10:50:49,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:49,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346675086] [2021-12-17 10:50:49,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346675086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:49,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682751017] [2021-12-17 10:50:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:49,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:49,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:49,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:49,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 10:50:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 10:50:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 10:50:49,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:50:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 10:50:49,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682751017] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:50:49,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:50:49,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2021-12-17 10:50:49,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697848704] [2021-12-17 10:50:49,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:50:49,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 10:50:49,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 10:50:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-17 10:50:49,705 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:49,768 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-12-17 10:50:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 10:50:49,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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 21 [2021-12-17 10:50:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:49,770 INFO L225 Difference]: With dead ends: 56 [2021-12-17 10:50:49,770 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 10:50:49,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 10:50:49,771 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:49,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 78 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:50:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 10:50:49,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-12-17 10:50:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 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) [2021-12-17 10:50:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-17 10:50:49,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2021-12-17 10:50:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:49,784 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-17 10:50:49,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-17 10:50:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 10:50:49,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:49,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:49,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 10:50:49,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:49,985 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1604143171, now seen corresponding path program 1 times [2021-12-17 10:50:49,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:49,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775630207] [2021-12-17 10:50:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:49,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 10:50:50,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:50,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775630207] [2021-12-17 10:50:50,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775630207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:50,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201409725] [2021-12-17 10:50:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:50,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:50,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:50,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:50,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 10:50:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 10:50:50,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 10:50:50,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:50:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 10:50:50,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201409725] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:50:50,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:50:50,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-17 10:50:50,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136066382] [2021-12-17 10:50:50,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:50:50,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 10:50:50,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 10:50:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-17 10:50:50,206 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2021-12-17 10:50:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:50,244 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-12-17 10:50:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:50:50,245 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) Word has length 23 [2021-12-17 10:50:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:50,247 INFO L225 Difference]: With dead ends: 59 [2021-12-17 10:50:50,247 INFO L226 Difference]: Without dead ends: 54 [2021-12-17 10:50:50,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-17 10:50:50,248 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:50,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:50:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-17 10:50:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2021-12-17 10:50:50,256 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) [2021-12-17 10:50:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-17 10:50:50,257 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2021-12-17 10:50:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:50,257 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-17 10:50:50,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2021-12-17 10:50:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-17 10:50:50,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 10:50:50,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:50,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:50,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 10:50:50,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:50,475 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:50,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1602296129, now seen corresponding path program 1 times [2021-12-17 10:50:50,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:50,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685958759] [2021-12-17 10:50:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:50,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 10:50:50,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:50,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685958759] [2021-12-17 10:50:50,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685958759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:50:50,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:50:50,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 10:50:50,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698504496] [2021-12-17 10:50:50,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:50:50,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 10:50:50,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:50,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 10:50:50,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 10:50:50,533 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:50,582 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-12-17 10:50:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:50:50,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-17 10:50:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:50,583 INFO L225 Difference]: With dead ends: 49 [2021-12-17 10:50:50,583 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 10:50:50,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-17 10:50:50,585 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:50,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 82 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:50:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 10:50:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-12-17 10:50:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-17 10:50:50,598 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2021-12-17 10:50:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:50,598 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-17 10:50:50,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-17 10:50:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 10:50:50,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:50,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:50,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 10:50:50,599 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:50,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:50,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1934230497, now seen corresponding path program 2 times [2021-12-17 10:50:50,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:50,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413278328] [2021-12-17 10:50:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:50,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:50,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:50,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413278328] [2021-12-17 10:50:50,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413278328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:50,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588209079] [2021-12-17 10:50:50,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:50:50,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:50,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:50,762 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:50,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 10:50:50,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:50:50,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:50:50,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 10:50:50,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:51,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:50:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:51,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588209079] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:50:51,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:50:51,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-17 10:50:51,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798189529] [2021-12-17 10:50:51,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:50:51,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 10:50:51,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:51,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 10:50:51,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-12-17 10:50:51,357 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:51,611 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-12-17 10:50:51,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 10:50:51,612 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 25 [2021-12-17 10:50:51,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:51,612 INFO L225 Difference]: With dead ends: 55 [2021-12-17 10:50:51,612 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 10:50:51,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2021-12-17 10:50:51,613 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:51,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 71 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:50:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 10:50:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-12-17 10:50:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-12-17 10:50:51,617 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2021-12-17 10:50:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:51,617 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-12-17 10:50:51,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-12-17 10:50:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 10:50:51,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:51,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:51,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 10:50:51,825 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 [2021-12-17 10:50:51,826 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash 836427775, now seen corresponding path program 2 times [2021-12-17 10:50:51,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:51,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389785113] [2021-12-17 10:50:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:51,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:51,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389785113] [2021-12-17 10:50:51,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389785113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090370541] [2021-12-17 10:50:51,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:50:51,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:51,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:51,992 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:51,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 10:50:52,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:50:52,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:50:52,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 10:50:52,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:52,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:50:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:52,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090370541] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:50:52,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:50:52,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-17 10:50:52,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143875095] [2021-12-17 10:50:52,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:50:52,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 10:50:52,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 10:50:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-12-17 10:50:52,482 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:52,662 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-12-17 10:50:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 10:50:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 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 25 [2021-12-17 10:50:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:52,663 INFO L225 Difference]: With dead ends: 47 [2021-12-17 10:50:52,663 INFO L226 Difference]: Without dead ends: 41 [2021-12-17 10:50:52,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2021-12-17 10:50:52,664 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 89 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:52,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 31 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:50:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-17 10:50:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-12-17 10:50:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-12-17 10:50:52,668 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2021-12-17 10:50:52,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:52,668 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-12-17 10:50:52,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-12-17 10:50:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 10:50:52,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:52,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:52,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 10:50:52,884 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 [2021-12-17 10:50:52,885 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash 924111969, now seen corresponding path program 3 times [2021-12-17 10:50:52,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:52,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861454742] [2021-12-17 10:50:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:52,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:53,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:53,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861454742] [2021-12-17 10:50:53,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861454742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:53,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458756118] [2021-12-17 10:50:53,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:50:53,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:53,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:53,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 10:50:53,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 10:50:53,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:50:53,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 10:50:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:53,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:50:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:53,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458756118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:50:53,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:50:53,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2021-12-17 10:50:53,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486346314] [2021-12-17 10:50:53,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:50:53,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 10:50:53,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 10:50:53,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-12-17 10:50:53,791 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:54,329 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-12-17 10:50:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 10:50:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 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 27 [2021-12-17 10:50:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:54,330 INFO L225 Difference]: With dead ends: 83 [2021-12-17 10:50:54,331 INFO L226 Difference]: Without dead ends: 64 [2021-12-17 10:50:54,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 10:50:54,332 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 175 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:54,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 117 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:50:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-17 10:50:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-12-17 10:50:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-17 10:50:54,336 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2021-12-17 10:50:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:54,336 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-17 10:50:54,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-17 10:50:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 10:50:54,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:54,337 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:54,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 10:50:54,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:54,555 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash -98803427, now seen corresponding path program 3 times [2021-12-17 10:50:54,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:54,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336942699] [2021-12-17 10:50:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:54,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:54,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:54,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336942699] [2021-12-17 10:50:54,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336942699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:54,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259147336] [2021-12-17 10:50:54,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:50:54,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:54,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:54,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:54,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 10:50:54,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 10:50:54,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:50:54,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 10:50:54,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:55,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:50:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:55,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259147336] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:50:55,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:50:55,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2021-12-17 10:50:55,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203574080] [2021-12-17 10:50:55,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:50:55,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 10:50:55,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 10:50:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-12-17 10:50:55,329 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:55,658 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-12-17 10:50:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 10:50:55,659 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 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 27 [2021-12-17 10:50:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:55,659 INFO L225 Difference]: With dead ends: 65 [2021-12-17 10:50:55,659 INFO L226 Difference]: Without dead ends: 59 [2021-12-17 10:50:55,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 10:50:55,660 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:55,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 113 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:50:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-17 10:50:55,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2021-12-17 10:50:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-12-17 10:50:55,664 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2021-12-17 10:50:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:55,664 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-12-17 10:50:55,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-12-17 10:50:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 10:50:55,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:55,665 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:55,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 10:50:55,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 10:50:55,871 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:55,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1588252031, now seen corresponding path program 4 times [2021-12-17 10:50:55,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:55,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879262662] [2021-12-17 10:50:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:55,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:56,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:56,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879262662] [2021-12-17 10:50:56,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879262662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:56,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900600626] [2021-12-17 10:50:56,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:50:56,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:56,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:56,065 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:56,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 10:50:56,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:50:56,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:50:56,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 10:50:56,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:56,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:50:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900600626] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:50:56,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:50:56,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2021-12-17 10:50:56,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485434962] [2021-12-17 10:50:56,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:50:56,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 10:50:56,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 10:50:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-12-17 10:50:56,667 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:56,996 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-12-17 10:50:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 10:50:56,996 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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 29 [2021-12-17 10:50:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:56,997 INFO L225 Difference]: With dead ends: 63 [2021-12-17 10:50:56,997 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 10:50:56,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=1021, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 10:50:56,998 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:56,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 84 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:50:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 10:50:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-17 10:50:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-12-17 10:50:57,002 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2021-12-17 10:50:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:57,003 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-12-17 10:50:57,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-12-17 10:50:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 10:50:57,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:57,004 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:57,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 10:50:57,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 10:50:57,218 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:57,218 INFO L85 PathProgramCache]: Analyzing trace with hash -462032417, now seen corresponding path program 4 times [2021-12-17 10:50:57,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:57,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765652301] [2021-12-17 10:50:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:57,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:57,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:57,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765652301] [2021-12-17 10:50:57,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765652301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:57,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034844792] [2021-12-17 10:50:57,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:50:57,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:57,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:57,413 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:57,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 10:50:57,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:50:57,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:50:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 10:50:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:57,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:50:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:57,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034844792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:50:57,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:50:57,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2021-12-17 10:50:57,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305679045] [2021-12-17 10:50:57,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:50:57,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 10:50:57,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 10:50:57,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-12-17 10:50:57,994 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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) [2021-12-17 10:50:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:50:58,222 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-12-17 10:50:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 10:50:58,223 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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 29 [2021-12-17 10:50:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:50:58,223 INFO L225 Difference]: With dead ends: 53 [2021-12-17 10:50:58,223 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 10:50:58,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=346, Invalid=914, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 10:50:58,224 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 125 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:50:58,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 33 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:50:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 10:50:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-12-17 10:50:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:50:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-12-17 10:50:58,227 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 29 [2021-12-17 10:50:58,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:50:58,228 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-12-17 10:50:58,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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) [2021-12-17 10:50:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-12-17 10:50:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 10:50:58,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:50:58,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:50:58,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 10:50:58,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 10:50:58,429 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:50:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:50:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1355616703, now seen corresponding path program 5 times [2021-12-17 10:50:58,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:50:58,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865476054] [2021-12-17 10:50:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:50:58,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:50:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:50:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:58,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:50:58,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865476054] [2021-12-17 10:50:58,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865476054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:50:58,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869512465] [2021-12-17 10:50:58,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:50:58,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:50:58,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:50:58,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:50:58,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 10:50:58,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 10:50:58,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:50:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 10:50:58,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:50:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:59,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:50:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:50:59,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869512465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:50:59,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:50:59,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-17 10:50:59,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881495926] [2021-12-17 10:50:59,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:50:59,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 10:50:59,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:50:59,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 10:50:59,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 10:50:59,381 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:00,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:00,158 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-12-17 10:51:00,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 10:51:00,159 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 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 31 [2021-12-17 10:51:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:00,159 INFO L225 Difference]: With dead ends: 93 [2021-12-17 10:51:00,159 INFO L226 Difference]: Without dead ends: 72 [2021-12-17 10:51:00,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=485, Invalid=1771, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 10:51:00,161 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 168 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:00,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 147 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-17 10:51:00,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2021-12-17 10:51:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-17 10:51:00,166 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2021-12-17 10:51:00,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:00,166 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-17 10:51:00,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-17 10:51:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 10:51:00,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:00,166 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:00,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:00,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 10:51:00,367 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash 943358845, now seen corresponding path program 5 times [2021-12-17 10:51:00,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:00,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084794183] [2021-12-17 10:51:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:00,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:00,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:00,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084794183] [2021-12-17 10:51:00,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084794183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:00,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728584270] [2021-12-17 10:51:00,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:51:00,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:00,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:00,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:00,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 10:51:00,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 10:51:00,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:00,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 10:51:00,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:01,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:01,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728584270] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:01,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:01,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2021-12-17 10:51:01,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219101328] [2021-12-17 10:51:01,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:01,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 10:51:01,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 10:51:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 10:51:01,264 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:01,584 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-12-17 10:51:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 10:51:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 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 31 [2021-12-17 10:51:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:01,585 INFO L225 Difference]: With dead ends: 71 [2021-12-17 10:51:01,585 INFO L226 Difference]: Without dead ends: 65 [2021-12-17 10:51:01,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=511, Invalid=1469, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 10:51:01,586 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:01,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 84 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-17 10:51:01,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2021-12-17 10:51:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-12-17 10:51:01,590 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2021-12-17 10:51:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:01,590 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-12-17 10:51:01,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:01,590 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-12-17 10:51:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 10:51:01,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:01,591 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:01,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:01,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 10:51:01,803 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:01,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1916151841, now seen corresponding path program 6 times [2021-12-17 10:51:01,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:01,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392637371] [2021-12-17 10:51:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:01,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:02,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:02,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392637371] [2021-12-17 10:51:02,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392637371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:02,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990653025] [2021-12-17 10:51:02,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:51:02,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:02,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:02,027 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:02,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 10:51:02,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-17 10:51:02,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:02,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 10:51:02,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:02,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:02,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990653025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:02,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:02,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2021-12-17 10:51:02,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375984099] [2021-12-17 10:51:02,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:02,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 10:51:02,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:02,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 10:51:02,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 10:51:02,681 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:03,003 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-12-17 10:51:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 10:51:03,003 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 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 33 [2021-12-17 10:51:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:03,004 INFO L225 Difference]: With dead ends: 71 [2021-12-17 10:51:03,004 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 10:51:03,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 10:51:03,014 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:03,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 67 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 10:51:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-17 10:51:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-12-17 10:51:03,019 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 33 [2021-12-17 10:51:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:03,019 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-12-17 10:51:03,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-12-17 10:51:03,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 10:51:03,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:03,019 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:03,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:03,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 10:51:03,220 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1672289471, now seen corresponding path program 6 times [2021-12-17 10:51:03,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:03,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818539251] [2021-12-17 10:51:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:03,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:03,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:03,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818539251] [2021-12-17 10:51:03,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818539251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:03,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751953237] [2021-12-17 10:51:03,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:51:03,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:03,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:03,435 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:03,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 10:51:03,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-17 10:51:03,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 10:51:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:03,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:04,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751953237] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:04,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:04,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2021-12-17 10:51:04,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646814311] [2021-12-17 10:51:04,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:04,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 10:51:04,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 10:51:04,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 10:51:04,043 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:04,286 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-12-17 10:51:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 10:51:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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 33 [2021-12-17 10:51:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:04,288 INFO L225 Difference]: With dead ends: 59 [2021-12-17 10:51:04,288 INFO L226 Difference]: Without dead ends: 53 [2021-12-17 10:51:04,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 10:51:04,289 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 163 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:04,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 40 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-17 10:51:04,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-12-17 10:51:04,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-12-17 10:51:04,293 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 33 [2021-12-17 10:51:04,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:04,293 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-12-17 10:51:04,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:04,293 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-12-17 10:51:04,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 10:51:04,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:04,293 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:04,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:04,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:04,507 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1028317473, now seen corresponding path program 7 times [2021-12-17 10:51:04,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:04,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665080998] [2021-12-17 10:51:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:04,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:04,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:04,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665080998] [2021-12-17 10:51:04,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665080998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:04,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898943044] [2021-12-17 10:51:04,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:51:04,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:04,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:04,745 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:04,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 10:51:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 10:51:04,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:05,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:05,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898943044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:05,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:05,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2021-12-17 10:51:05,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318650297] [2021-12-17 10:51:05,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:05,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 10:51:05,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:05,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 10:51:05,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 10:51:05,536 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:06,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:06,216 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-12-17 10:51:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 10:51:06,216 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 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 [2021-12-17 10:51:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:06,217 INFO L225 Difference]: With dead ends: 103 [2021-12-17 10:51:06,217 INFO L226 Difference]: Without dead ends: 80 [2021-12-17 10:51:06,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=600, Invalid=2262, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 10:51:06,220 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 207 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:06,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 96 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-17 10:51:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-12-17 10:51:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-12-17 10:51:06,228 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2021-12-17 10:51:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:06,228 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-12-17 10:51:06,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-12-17 10:51:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 10:51:06,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:06,230 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:06,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:06,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:06,442 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:06,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash 208821981, now seen corresponding path program 7 times [2021-12-17 10:51:06,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:06,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133616176] [2021-12-17 10:51:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:06,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:06,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:06,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133616176] [2021-12-17 10:51:06,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133616176] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:06,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088562934] [2021-12-17 10:51:06,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:51:06,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:06,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:06,696 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:06,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 10:51:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 10:51:06,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:07,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:07,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088562934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:07,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:07,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 40 [2021-12-17 10:51:07,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832445295] [2021-12-17 10:51:07,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:07,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 10:51:07,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 10:51:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 10:51:07,395 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:07,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:07,796 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-12-17 10:51:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 10:51:07,796 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 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 [2021-12-17 10:51:07,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:07,797 INFO L225 Difference]: With dead ends: 77 [2021-12-17 10:51:07,797 INFO L226 Difference]: Without dead ends: 71 [2021-12-17 10:51:07,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=652, Invalid=1898, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 10:51:07,798 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:07,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 93 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-17 10:51:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2021-12-17 10:51:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-17 10:51:07,803 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2021-12-17 10:51:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:07,803 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-17 10:51:07,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:07,803 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-17 10:51:07,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 10:51:07,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:07,804 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:07,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:08,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:08,019 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:08,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:08,020 INFO L85 PathProgramCache]: Analyzing trace with hash 863525695, now seen corresponding path program 8 times [2021-12-17 10:51:08,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:08,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824042756] [2021-12-17 10:51:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:08,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:08,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:08,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824042756] [2021-12-17 10:51:08,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824042756] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:08,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796625753] [2021-12-17 10:51:08,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:51:08,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:08,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:08,256 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:08,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 10:51:08,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:51:08,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:08,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 10:51:08,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:08,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:08,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796625753] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:08,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:08,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2021-12-17 10:51:08,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669684153] [2021-12-17 10:51:08,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:08,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 10:51:08,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 10:51:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 10:51:08,953 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:09,326 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-12-17 10:51:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 10:51:09,326 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 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 37 [2021-12-17 10:51:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:09,326 INFO L225 Difference]: With dead ends: 79 [2021-12-17 10:51:09,327 INFO L226 Difference]: Without dead ends: 56 [2021-12-17 10:51:09,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=1833, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 10:51:09,328 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 104 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:09,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 57 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-17 10:51:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-17 10:51:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-12-17 10:51:09,333 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2021-12-17 10:51:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:09,333 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-12-17 10:51:09,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-12-17 10:51:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 10:51:09,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:09,333 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:09,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:09,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:09,547 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:09,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:09,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1276272481, now seen corresponding path program 8 times [2021-12-17 10:51:09,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450264814] [2021-12-17 10:51:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:09,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:09,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:09,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450264814] [2021-12-17 10:51:09,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450264814] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:09,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532559226] [2021-12-17 10:51:09,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:51:09,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:09,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:09,789 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:09,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 10:51:09,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:51:09,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:09,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 10:51:09,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:10,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:10,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532559226] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:10,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:10,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2021-12-17 10:51:10,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948590205] [2021-12-17 10:51:10,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:10,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 10:51:10,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:10,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 10:51:10,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 10:51:10,415 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:10,712 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-12-17 10:51:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 10:51:10,712 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 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 37 [2021-12-17 10:51:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:10,712 INFO L225 Difference]: With dead ends: 65 [2021-12-17 10:51:10,712 INFO L226 Difference]: Without dead ends: 59 [2021-12-17 10:51:10,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=602, Invalid=1654, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 10:51:10,723 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 186 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:10,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 58 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-17 10:51:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2021-12-17 10:51:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-12-17 10:51:10,728 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 37 [2021-12-17 10:51:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:10,728 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-12-17 10:51:10,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-12-17 10:51:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 10:51:10,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:10,729 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:10,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:10,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:10,939 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:10,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2138696961, now seen corresponding path program 9 times [2021-12-17 10:51:10,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:10,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848895925] [2021-12-17 10:51:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:10,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:11,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:11,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848895925] [2021-12-17 10:51:11,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848895925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:11,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741959843] [2021-12-17 10:51:11,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:51:11,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:11,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:11,207 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:11,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 10:51:11,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-17 10:51:11,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:11,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 10:51:11,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:11,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:12,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741959843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:12,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:12,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 46 [2021-12-17 10:51:12,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703312656] [2021-12-17 10:51:12,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:12,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 10:51:12,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:12,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 10:51:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 10:51:12,047 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:12,934 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-12-17 10:51:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 10:51:12,935 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 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 39 [2021-12-17 10:51:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:12,935 INFO L225 Difference]: With dead ends: 113 [2021-12-17 10:51:12,935 INFO L226 Difference]: Without dead ends: 88 [2021-12-17 10:51:12,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=729, Invalid=2811, Unknown=0, NotChecked=0, Total=3540 [2021-12-17 10:51:12,936 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 158 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:12,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 148 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-17 10:51:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2021-12-17 10:51:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-17 10:51:12,941 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 39 [2021-12-17 10:51:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:12,941 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-17 10:51:12,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-17 10:51:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 10:51:12,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:12,942 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:12,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:13,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:13,151 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1939262659, now seen corresponding path program 9 times [2021-12-17 10:51:13,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:13,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638902941] [2021-12-17 10:51:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:13,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:13,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:13,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638902941] [2021-12-17 10:51:13,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638902941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:13,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455537192] [2021-12-17 10:51:13,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:51:13,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:13,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:13,432 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:13,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 10:51:13,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-17 10:51:13,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:13,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 10:51:13,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:13,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:14,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455537192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:14,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:14,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 45 [2021-12-17 10:51:14,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146251106] [2021-12-17 10:51:14,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:14,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 10:51:14,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:14,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 10:51:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 10:51:14,227 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:14,680 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-12-17 10:51:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 10:51:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 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 39 [2021-12-17 10:51:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:14,681 INFO L225 Difference]: With dead ends: 83 [2021-12-17 10:51:14,681 INFO L226 Difference]: Without dead ends: 77 [2021-12-17 10:51:14,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=811, Invalid=2381, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 10:51:14,682 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:14,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 78 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-17 10:51:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2021-12-17 10:51:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:14,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-12-17 10:51:14,693 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 39 [2021-12-17 10:51:14,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:14,693 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-12-17 10:51:14,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:14,694 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-12-17 10:51:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 10:51:14,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:14,694 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:14,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:14,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-17 10:51:14,903 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:14,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:14,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1861511265, now seen corresponding path program 10 times [2021-12-17 10:51:14,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:14,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623667242] [2021-12-17 10:51:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:14,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:15,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:15,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623667242] [2021-12-17 10:51:15,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623667242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:15,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940849650] [2021-12-17 10:51:15,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:51:15,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:15,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:15,170 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:15,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 10:51:15,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:51:15,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:15,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 10:51:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:15,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:15,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940849650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:15,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:15,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2021-12-17 10:51:15,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947477890] [2021-12-17 10:51:15,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:15,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 10:51:15,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:15,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 10:51:15,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 10:51:15,984 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:16,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:16,450 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-12-17 10:51:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 10:51:16,450 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 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 41 [2021-12-17 10:51:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:16,450 INFO L225 Difference]: With dead ends: 87 [2021-12-17 10:51:16,450 INFO L226 Difference]: Without dead ends: 62 [2021-12-17 10:51:16,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=644, Invalid=2326, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 10:51:16,451 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 85 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:16,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 91 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-17 10:51:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-12-17 10:51:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-12-17 10:51:16,457 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 41 [2021-12-17 10:51:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:16,457 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-12-17 10:51:16,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-12-17 10:51:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 10:51:16,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:16,458 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:16,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:16,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 10:51:16,663 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1603583359, now seen corresponding path program 10 times [2021-12-17 10:51:16,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:16,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985650819] [2021-12-17 10:51:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:16,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:16,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:16,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985650819] [2021-12-17 10:51:16,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985650819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:16,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837001916] [2021-12-17 10:51:16,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:51:16,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:16,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:16,949 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:16,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 10:51:16,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:51:16,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:16,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 10:51:16,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:17,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:17,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837001916] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:17,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:17,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2021-12-17 10:51:17,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288981415] [2021-12-17 10:51:17,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:17,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 10:51:17,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 10:51:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 10:51:17,719 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:18,038 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-12-17 10:51:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 10:51:18,039 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 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 41 [2021-12-17 10:51:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:18,039 INFO L225 Difference]: With dead ends: 71 [2021-12-17 10:51:18,039 INFO L226 Difference]: Without dead ends: 65 [2021-12-17 10:51:18,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 10:51:18,040 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 137 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:18,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 48 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-17 10:51:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-12-17 10:51:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-12-17 10:51:18,046 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 41 [2021-12-17 10:51:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:18,046 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-12-17 10:51:18,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-12-17 10:51:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:51:18,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:18,047 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:18,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-17 10:51:18,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 10:51:18,257 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash -573746719, now seen corresponding path program 11 times [2021-12-17 10:51:18,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:18,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800668411] [2021-12-17 10:51:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:18,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:18,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:18,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800668411] [2021-12-17 10:51:18,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800668411] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:18,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451018721] [2021-12-17 10:51:18,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:51:18,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:18,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:18,553 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:18,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 10:51:18,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 10:51:18,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:18,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 10:51:18,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:19,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:19,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451018721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:19,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:19,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2021-12-17 10:51:19,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603400126] [2021-12-17 10:51:19,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:19,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 10:51:19,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:19,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 10:51:19,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2092, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 10:51:19,530 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:20,361 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-12-17 10:51:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 10:51:20,367 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 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 43 [2021-12-17 10:51:20,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:20,368 INFO L225 Difference]: With dead ends: 123 [2021-12-17 10:51:20,368 INFO L226 Difference]: Without dead ends: 96 [2021-12-17 10:51:20,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=872, Invalid=3418, Unknown=0, NotChecked=0, Total=4290 [2021-12-17 10:51:20,369 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 213 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:20,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 166 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-17 10:51:20,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2021-12-17 10:51:20,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:20,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-17 10:51:20,375 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 43 [2021-12-17 10:51:20,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:20,375 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-17 10:51:20,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:20,375 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-17 10:51:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:51:20,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:20,375 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:20,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:20,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:20,576 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash -709607267, now seen corresponding path program 11 times [2021-12-17 10:51:20,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:20,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320592171] [2021-12-17 10:51:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:20,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:20,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:20,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320592171] [2021-12-17 10:51:20,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320592171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:20,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091688200] [2021-12-17 10:51:20,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:51:20,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:20,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:20,874 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:20,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 10:51:20,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 10:51:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 10:51:20,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:21,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:21,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091688200] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:21,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:21,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2021-12-17 10:51:21,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292132264] [2021-12-17 10:51:21,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:21,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 10:51:21,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:21,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 10:51:21,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1994, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 10:51:21,749 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:22,204 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-12-17 10:51:22,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 10:51:22,204 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 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 43 [2021-12-17 10:51:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:22,204 INFO L225 Difference]: With dead ends: 89 [2021-12-17 10:51:22,204 INFO L226 Difference]: Without dead ends: 83 [2021-12-17 10:51:22,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=988, Invalid=2918, Unknown=0, NotChecked=0, Total=3906 [2021-12-17 10:51:22,205 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:22,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 79 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-17 10:51:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2021-12-17 10:51:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-12-17 10:51:22,211 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 43 [2021-12-17 10:51:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:22,211 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-12-17 10:51:22,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-12-17 10:51:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 10:51:22,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:22,212 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:22,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-17 10:51:22,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 10:51:22,418 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1278685953, now seen corresponding path program 12 times [2021-12-17 10:51:22,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:22,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362576193] [2021-12-17 10:51:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:22,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:22,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:22,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362576193] [2021-12-17 10:51:22,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362576193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:22,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489104324] [2021-12-17 10:51:22,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:51:22,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:22,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:22,703 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:22,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 10:51:22,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 10:51:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:22,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:51:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:23,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:23,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489104324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:23,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:23,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2021-12-17 10:51:23,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019855825] [2021-12-17 10:51:23,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:23,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 10:51:23,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:23,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 10:51:23,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 10:51:23,602 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:24,170 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-12-17 10:51:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 10:51:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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 45 [2021-12-17 10:51:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:24,171 INFO L225 Difference]: With dead ends: 95 [2021-12-17 10:51:24,171 INFO L226 Difference]: Without dead ends: 68 [2021-12-17 10:51:24,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=783, Invalid=2877, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 10:51:24,172 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 125 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:24,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 120 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-17 10:51:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-17 10:51:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-12-17 10:51:24,178 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 45 [2021-12-17 10:51:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:24,178 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-12-17 10:51:24,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-12-17 10:51:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 10:51:24,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:24,178 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:24,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:24,391 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1695567009, now seen corresponding path program 12 times [2021-12-17 10:51:24,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:24,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106277824] [2021-12-17 10:51:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:24,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:24,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106277824] [2021-12-17 10:51:24,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106277824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103759131] [2021-12-17 10:51:24,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:51:24,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:24,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:24,697 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:24,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 10:51:24,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 10:51:24,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:24,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:51:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:25,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:25,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103759131] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:25,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:25,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2021-12-17 10:51:25,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550367602] [2021-12-17 10:51:25,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:25,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 10:51:25,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:25,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 10:51:25,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1891, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 10:51:25,545 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:25,933 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-12-17 10:51:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 10:51:25,934 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 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 45 [2021-12-17 10:51:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:25,934 INFO L225 Difference]: With dead ends: 77 [2021-12-17 10:51:25,934 INFO L226 Difference]: Without dead ends: 71 [2021-12-17 10:51:25,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2021-12-17 10:51:25,935 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 197 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:25,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 79 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-17 10:51:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-12-17 10:51:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-12-17 10:51:25,941 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 45 [2021-12-17 10:51:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:25,941 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-12-17 10:51:25,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-12-17 10:51:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:51:25,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:25,942 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:25,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:26,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-17 10:51:26,146 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1371385919, now seen corresponding path program 13 times [2021-12-17 10:51:26,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:26,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804830301] [2021-12-17 10:51:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:26,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:26,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:26,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804830301] [2021-12-17 10:51:26,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804830301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:26,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035030912] [2021-12-17 10:51:26,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:51:26,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:26,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:26,482 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:26,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 10:51:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 10:51:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:27,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:27,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035030912] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:27,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:27,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 56 [2021-12-17 10:51:27,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379941528] [2021-12-17 10:51:27,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:27,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-17 10:51:27,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-17 10:51:27,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=2529, Unknown=0, NotChecked=0, Total=3080 [2021-12-17 10:51:27,533 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:28,406 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2021-12-17 10:51:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 10:51:28,406 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 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 47 [2021-12-17 10:51:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:28,407 INFO L225 Difference]: With dead ends: 133 [2021-12-17 10:51:28,407 INFO L226 Difference]: Without dead ends: 104 [2021-12-17 10:51:28,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1029, Invalid=4083, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 10:51:28,408 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 274 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:28,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 111 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:28,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-17 10:51:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2021-12-17 10:51:28,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-12-17 10:51:28,415 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 47 [2021-12-17 10:51:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:28,415 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-12-17 10:51:28,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-12-17 10:51:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:51:28,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:28,415 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:28,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:28,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:28,616 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1311193347, now seen corresponding path program 13 times [2021-12-17 10:51:28,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:28,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064961103] [2021-12-17 10:51:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:28,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:28,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064961103] [2021-12-17 10:51:28,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064961103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108305606] [2021-12-17 10:51:28,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:51:28,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:28,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:28,977 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:28,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-17 10:51:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:29,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 10:51:29,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:29,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:29,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108305606] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:29,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:29,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 55 [2021-12-17 10:51:29,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030848326] [2021-12-17 10:51:29,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:29,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-17 10:51:29,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:29,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-17 10:51:29,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 10:51:29,940 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:30,435 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-12-17 10:51:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 10:51:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 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 47 [2021-12-17 10:51:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:30,436 INFO L225 Difference]: With dead ends: 95 [2021-12-17 10:51:30,436 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 10:51:30,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1183, Invalid=3509, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 10:51:30,437 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 287 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:30,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 93 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 10:51:30,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-12-17 10:51:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-12-17 10:51:30,448 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 47 [2021-12-17 10:51:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:30,448 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-12-17 10:51:30,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-12-17 10:51:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 10:51:30,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:30,449 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:30,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:30,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:30,649 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:30,649 INFO L85 PathProgramCache]: Analyzing trace with hash 417676127, now seen corresponding path program 14 times [2021-12-17 10:51:30,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:30,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152848361] [2021-12-17 10:51:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:30,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:30,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:30,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152848361] [2021-12-17 10:51:30,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152848361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:30,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549818719] [2021-12-17 10:51:30,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:51:30,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:30,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:30,951 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:30,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-17 10:51:30,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:51:30,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:30,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:51:30,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:31,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:31,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549818719] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:31,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:31,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2021-12-17 10:51:31,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546710014] [2021-12-17 10:51:31,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:31,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 10:51:31,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:31,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 10:51:31,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 10:51:31,960 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:32,520 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-12-17 10:51:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 10:51:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 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 49 [2021-12-17 10:51:32,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:32,521 INFO L225 Difference]: With dead ends: 103 [2021-12-17 10:51:32,521 INFO L226 Difference]: Without dead ends: 74 [2021-12-17 10:51:32,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=936, Invalid=3486, Unknown=0, NotChecked=0, Total=4422 [2021-12-17 10:51:32,522 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 128 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:32,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 52 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-17 10:51:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-12-17 10:51:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-12-17 10:51:32,529 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 49 [2021-12-17 10:51:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:32,529 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-12-17 10:51:32,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-12-17 10:51:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 10:51:32,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:32,529 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:32,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:32,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:32,743 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1748746815, now seen corresponding path program 14 times [2021-12-17 10:51:32,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:32,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940201264] [2021-12-17 10:51:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:32,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:33,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:33,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940201264] [2021-12-17 10:51:33,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940201264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:33,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375863790] [2021-12-17 10:51:33,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:51:33,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:33,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:33,137 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:33,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-17 10:51:33,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:51:33,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:33,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:51:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:33,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:34,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375863790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:34,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:34,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2021-12-17 10:51:34,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139845670] [2021-12-17 10:51:34,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:34,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 10:51:34,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 10:51:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 10:51:34,076 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:34,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:34,478 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-12-17 10:51:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 10:51:34,479 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 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 49 [2021-12-17 10:51:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:34,479 INFO L225 Difference]: With dead ends: 83 [2021-12-17 10:51:34,479 INFO L226 Difference]: Without dead ends: 77 [2021-12-17 10:51:34,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2021-12-17 10:51:34,480 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 185 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:34,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 60 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:34,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-17 10:51:34,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-12-17 10:51:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-12-17 10:51:34,487 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 49 [2021-12-17 10:51:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:34,487 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-12-17 10:51:34,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-12-17 10:51:34,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:51:34,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:34,488 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:34,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:34,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-17 10:51:34,703 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:34,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1489381025, now seen corresponding path program 15 times [2021-12-17 10:51:34,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:34,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160788754] [2021-12-17 10:51:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:34,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:35,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:35,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160788754] [2021-12-17 10:51:35,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160788754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:35,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372786475] [2021-12-17 10:51:35,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:51:35,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:35,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:35,099 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:35,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-17 10:51:35,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 10:51:35,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:35,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-17 10:51:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:35,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:36,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372786475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:36,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:36,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 61 [2021-12-17 10:51:36,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421749718] [2021-12-17 10:51:36,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:36,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-17 10:51:36,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-17 10:51:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3007, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 10:51:36,321 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:37,326 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-12-17 10:51:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 10:51:37,326 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 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 51 [2021-12-17 10:51:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:37,329 INFO L225 Difference]: With dead ends: 143 [2021-12-17 10:51:37,329 INFO L226 Difference]: Without dead ends: 112 [2021-12-17 10:51:37,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1200, Invalid=4806, Unknown=0, NotChecked=0, Total=6006 [2021-12-17 10:51:37,330 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 274 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:37,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 114 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-17 10:51:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2021-12-17 10:51:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-12-17 10:51:37,339 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 51 [2021-12-17 10:51:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:37,339 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-12-17 10:51:37,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-12-17 10:51:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:51:37,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:37,340 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:37,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:37,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-17 10:51:37,563 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash 978060893, now seen corresponding path program 15 times [2021-12-17 10:51:37,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:37,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645044376] [2021-12-17 10:51:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:37,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:37,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:37,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645044376] [2021-12-17 10:51:37,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645044376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:37,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434127844] [2021-12-17 10:51:37,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:51:37,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:37,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:37,996 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:37,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-17 10:51:38,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 10:51:38,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-17 10:51:38,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:38,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:39,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434127844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:39,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:39,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 60 [2021-12-17 10:51:39,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672086880] [2021-12-17 10:51:39,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:39,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-17 10:51:39,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:39,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-17 10:51:39,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=2887, Unknown=0, NotChecked=0, Total=3540 [2021-12-17 10:51:39,113 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:39,679 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-12-17 10:51:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 10:51:39,680 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 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 51 [2021-12-17 10:51:39,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:39,680 INFO L225 Difference]: With dead ends: 101 [2021-12-17 10:51:39,680 INFO L226 Difference]: Without dead ends: 95 [2021-12-17 10:51:39,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1396, Invalid=4154, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 10:51:39,683 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:39,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 113 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-17 10:51:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2021-12-17 10:51:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-12-17 10:51:39,694 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 51 [2021-12-17 10:51:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:39,694 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-12-17 10:51:39,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-12-17 10:51:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 10:51:39,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:39,695 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:39,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-17 10:51:39,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:39,903 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1367745215, now seen corresponding path program 16 times [2021-12-17 10:51:39,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:39,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212760948] [2021-12-17 10:51:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:39,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:40,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:40,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212760948] [2021-12-17 10:51:40,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212760948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:40,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232666911] [2021-12-17 10:51:40,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:51:40,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:40,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:40,264 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:40,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-17 10:51:40,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:51:40,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:40,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:51:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:40,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:41,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232666911] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:41,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:41,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2021-12-17 10:51:41,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917719558] [2021-12-17 10:51:41,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:41,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-17 10:51:41,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:41,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-17 10:51:41,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2771, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 10:51:41,383 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:42,022 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-12-17 10:51:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 10:51:42,022 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 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 53 [2021-12-17 10:51:42,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:42,023 INFO L225 Difference]: With dead ends: 111 [2021-12-17 10:51:42,023 INFO L226 Difference]: Without dead ends: 80 [2021-12-17 10:51:42,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1103, Invalid=4153, Unknown=0, NotChecked=0, Total=5256 [2021-12-17 10:51:42,024 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:42,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 105 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:51:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-17 10:51:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-12-17 10:51:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-12-17 10:51:42,032 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 53 [2021-12-17 10:51:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:42,032 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-12-17 10:51:42,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-12-17 10:51:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 10:51:42,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:42,033 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:42,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-17 10:51:42,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-17 10:51:42,239 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1146738145, now seen corresponding path program 16 times [2021-12-17 10:51:42,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772912576] [2021-12-17 10:51:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:42,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:42,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:42,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772912576] [2021-12-17 10:51:42,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772912576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:42,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367526135] [2021-12-17 10:51:42,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:51:42,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:42,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:42,669 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:42,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-17 10:51:42,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:51:42,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:42,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:51:42,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:43,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:43,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367526135] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:43,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:43,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2021-12-17 10:51:43,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059985883] [2021-12-17 10:51:43,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:43,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-17 10:51:43,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-17 10:51:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2762, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 10:51:43,725 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:44,180 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-12-17 10:51:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 10:51:44,181 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 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 53 [2021-12-17 10:51:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:44,181 INFO L225 Difference]: With dead ends: 89 [2021-12-17 10:51:44,181 INFO L226 Difference]: Without dead ends: 83 [2021-12-17 10:51:44,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1330, Invalid=3782, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 10:51:44,182 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 248 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:44,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 62 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-17 10:51:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-12-17 10:51:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-12-17 10:51:44,190 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 53 [2021-12-17 10:51:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:44,191 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-12-17 10:51:44,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-12-17 10:51:44,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:51:44,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:44,191 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:44,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:44,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-17 10:51:44,396 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2067142273, now seen corresponding path program 17 times [2021-12-17 10:51:44,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:44,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808056131] [2021-12-17 10:51:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:44,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:44,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808056131] [2021-12-17 10:51:44,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808056131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639132078] [2021-12-17 10:51:44,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:51:44,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:44,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:44,836 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:44,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-17 10:51:44,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-17 10:51:44,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:44,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 10:51:44,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:45,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:46,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639132078] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:46,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:46,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 66 [2021-12-17 10:51:46,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651995059] [2021-12-17 10:51:46,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:46,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-17 10:51:46,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-17 10:51:46,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=3526, Unknown=0, NotChecked=0, Total=4290 [2021-12-17 10:51:46,159 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:47,309 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-12-17 10:51:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 10:51:47,309 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 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 55 [2021-12-17 10:51:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:47,310 INFO L225 Difference]: With dead ends: 153 [2021-12-17 10:51:47,310 INFO L226 Difference]: Without dead ends: 120 [2021-12-17 10:51:47,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1385, Invalid=5587, Unknown=0, NotChecked=0, Total=6972 [2021-12-17 10:51:47,311 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 253 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:47,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 174 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:47,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-17 10:51:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2021-12-17 10:51:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-12-17 10:51:47,321 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 55 [2021-12-17 10:51:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:47,321 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-12-17 10:51:47,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-12-17 10:51:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:51:47,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:47,322 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:47,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-17 10:51:47,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-17 10:51:47,522 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:47,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:47,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2087927485, now seen corresponding path program 17 times [2021-12-17 10:51:47,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:47,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879899609] [2021-12-17 10:51:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:47,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:47,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:47,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879899609] [2021-12-17 10:51:47,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879899609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:47,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910625173] [2021-12-17 10:51:47,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:51:47,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:47,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:47,997 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:47,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-17 10:51:48,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-17 10:51:48,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:48,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 10:51:48,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:48,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:49,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910625173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:49,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:49,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 65 [2021-12-17 10:51:49,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059468023] [2021-12-17 10:51:49,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:49,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 10:51:49,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 10:51:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 10:51:49,208 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:49,806 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2021-12-17 10:51:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 10:51:49,807 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 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 55 [2021-12-17 10:51:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:49,807 INFO L225 Difference]: With dead ends: 107 [2021-12-17 10:51:49,807 INFO L226 Difference]: Without dead ends: 101 [2021-12-17 10:51:49,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1627, Invalid=4853, Unknown=0, NotChecked=0, Total=6480 [2021-12-17 10:51:49,808 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 294 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:49,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 108 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-17 10:51:49,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2021-12-17 10:51:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-12-17 10:51:49,817 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 55 [2021-12-17 10:51:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:49,817 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-12-17 10:51:49,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-12-17 10:51:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 10:51:49,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:49,818 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:49,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:50,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:50,031 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:50,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1497316577, now seen corresponding path program 18 times [2021-12-17 10:51:50,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:50,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761682231] [2021-12-17 10:51:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:50,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:50,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:50,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761682231] [2021-12-17 10:51:50,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761682231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:50,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736467511] [2021-12-17 10:51:50,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:51:50,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:50,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:50,427 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:50,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-17 10:51:50,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-17 10:51:50,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:50,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:51:50,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:51,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:51,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736467511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:51,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:51,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2021-12-17 10:51:51,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832984035] [2021-12-17 10:51:51,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:51,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-17 10:51:51,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-17 10:51:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3269, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 10:51:51,676 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:52,420 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2021-12-17 10:51:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 10:51:52,420 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 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 57 [2021-12-17 10:51:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:52,421 INFO L225 Difference]: With dead ends: 119 [2021-12-17 10:51:52,421 INFO L226 Difference]: Without dead ends: 86 [2021-12-17 10:51:52,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2381 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1284, Invalid=4878, Unknown=0, NotChecked=0, Total=6162 [2021-12-17 10:51:52,422 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:52,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 111 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-17 10:51:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-12-17 10:51:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-12-17 10:51:52,431 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 57 [2021-12-17 10:51:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:52,431 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-12-17 10:51:52,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-12-17 10:51:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 10:51:52,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:52,432 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:52,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:52,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:52,632 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:52,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1622398209, now seen corresponding path program 18 times [2021-12-17 10:51:52,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:52,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067224783] [2021-12-17 10:51:52,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:52,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:53,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:53,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067224783] [2021-12-17 10:51:53,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067224783] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:53,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336688273] [2021-12-17 10:51:53,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:51:53,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:53,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:53,121 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:53,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-17 10:51:53,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-17 10:51:53,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:51:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:51:53,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:53,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:54,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336688273] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:54,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:54,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2021-12-17 10:51:54,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252625971] [2021-12-17 10:51:54,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:54,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-17 10:51:54,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:54,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-17 10:51:54,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=3259, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 10:51:54,301 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:54,793 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-12-17 10:51:54,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 10:51:54,794 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 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 57 [2021-12-17 10:51:54,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:54,794 INFO L225 Difference]: With dead ends: 95 [2021-12-17 10:51:54,794 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 10:51:54,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1557, Invalid=4449, Unknown=0, NotChecked=0, Total=6006 [2021-12-17 10:51:54,795 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 210 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:54,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 65 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 10:51:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-12-17 10:51:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2021-12-17 10:51:54,805 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 57 [2021-12-17 10:51:54,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:54,805 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2021-12-17 10:51:54,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2021-12-17 10:51:54,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:51:54,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:54,806 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:54,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-17 10:51:55,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-17 10:51:55,014 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:55,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:55,015 INFO L85 PathProgramCache]: Analyzing trace with hash 224354145, now seen corresponding path program 19 times [2021-12-17 10:51:55,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:55,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47125296] [2021-12-17 10:51:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:55,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:55,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:55,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47125296] [2021-12-17 10:51:55,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47125296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:55,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778045173] [2021-12-17 10:51:55,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:51:55,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:55,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:55,466 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:55,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-17 10:51:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:55,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 10:51:55,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:56,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:51:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:56,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778045173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:51:56,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:51:56,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2021-12-17 10:51:56,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466327652] [2021-12-17 10:51:56,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:51:56,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-17 10:51:56,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:51:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-17 10:51:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=4086, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 10:51:56,889 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:51:58,117 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2021-12-17 10:51:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 10:51:58,117 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 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 59 [2021-12-17 10:51:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:51:58,118 INFO L225 Difference]: With dead ends: 163 [2021-12-17 10:51:58,118 INFO L226 Difference]: Without dead ends: 128 [2021-12-17 10:51:58,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1584, Invalid=6426, Unknown=0, NotChecked=0, Total=8010 [2021-12-17 10:51:58,118 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 243 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:51:58,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 152 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:51:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-17 10:51:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2021-12-17 10:51:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-12-17 10:51:58,129 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 59 [2021-12-17 10:51:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:51:58,129 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-12-17 10:51:58,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:51:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-12-17 10:51:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:51:58,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:51:58,130 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:51:58,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-17 10:51:58,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-17 10:51:58,332 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:51:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:51:58,332 INFO L85 PathProgramCache]: Analyzing trace with hash 497266717, now seen corresponding path program 19 times [2021-12-17 10:51:58,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:51:58,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919591358] [2021-12-17 10:51:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:51:58,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:51:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:58,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:51:58,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919591358] [2021-12-17 10:51:58,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919591358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:51:58,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861213571] [2021-12-17 10:51:58,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:51:58,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:51:58,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:51:58,863 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:51:58,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-17 10:51:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:51:58,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 10:51:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:51:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:51:59,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:00,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861213571] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:00,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:00,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 70 [2021-12-17 10:52:00,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943968713] [2021-12-17 10:52:00,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:00,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-17 10:52:00,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:00,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-17 10:52:00,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=886, Invalid=3944, Unknown=0, NotChecked=0, Total=4830 [2021-12-17 10:52:00,206 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:00,868 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2021-12-17 10:52:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 10:52:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 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 59 [2021-12-17 10:52:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:00,868 INFO L225 Difference]: With dead ends: 113 [2021-12-17 10:52:00,868 INFO L226 Difference]: Without dead ends: 107 [2021-12-17 10:52:00,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1876, Invalid=5606, Unknown=0, NotChecked=0, Total=7482 [2021-12-17 10:52:00,869 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 207 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:00,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 112 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:00,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-17 10:52:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2021-12-17 10:52:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-12-17 10:52:00,880 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 59 [2021-12-17 10:52:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:00,880 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-12-17 10:52:00,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-12-17 10:52:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 10:52:00,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:00,881 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:00,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-17 10:52:01,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-17 10:52:01,081 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1113957249, now seen corresponding path program 20 times [2021-12-17 10:52:01,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:01,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818692993] [2021-12-17 10:52:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:01,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:01,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818692993] [2021-12-17 10:52:01,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818692993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218538103] [2021-12-17 10:52:01,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:52:01,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:01,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:01,510 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:01,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-17 10:52:01,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:52:01,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:01,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:52:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:02,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:02,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218538103] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:02,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:02,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2021-12-17 10:52:02,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915274980] [2021-12-17 10:52:02,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:02,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-17 10:52:02,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:02,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-17 10:52:02,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=3808, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 10:52:02,890 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:03,663 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2021-12-17 10:52:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 10:52:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 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 61 [2021-12-17 10:52:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:03,664 INFO L225 Difference]: With dead ends: 127 [2021-12-17 10:52:03,664 INFO L226 Difference]: Without dead ends: 92 [2021-12-17 10:52:03,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1479, Invalid=5661, Unknown=0, NotChecked=0, Total=7140 [2021-12-17 10:52:03,665 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 147 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:03,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 91 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-17 10:52:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-12-17 10:52:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-12-17 10:52:03,676 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 61 [2021-12-17 10:52:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:03,676 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-12-17 10:52:03,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-12-17 10:52:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 10:52:03,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:03,677 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:03,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-17 10:52:03,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-17 10:52:03,877 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:03,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:03,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1463485663, now seen corresponding path program 20 times [2021-12-17 10:52:03,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:03,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584872861] [2021-12-17 10:52:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:03,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:04,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:04,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584872861] [2021-12-17 10:52:04,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584872861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:04,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539516368] [2021-12-17 10:52:04,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:52:04,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:04,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:04,366 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:04,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-17 10:52:04,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:52:04,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:04,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:52:04,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:05,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:05,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539516368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:05,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:05,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2021-12-17 10:52:05,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465371020] [2021-12-17 10:52:05,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:05,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-17 10:52:05,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-17 10:52:05,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=3797, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 10:52:05,679 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:06,247 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-12-17 10:52:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 10:52:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 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 61 [2021-12-17 10:52:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:06,248 INFO L225 Difference]: With dead ends: 101 [2021-12-17 10:52:06,248 INFO L226 Difference]: Without dead ends: 95 [2021-12-17 10:52:06,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1802, Invalid=5170, Unknown=0, NotChecked=0, Total=6972 [2021-12-17 10:52:06,249 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 259 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:06,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 56 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-17 10:52:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-12-17 10:52:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2021-12-17 10:52:06,260 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 61 [2021-12-17 10:52:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:06,260 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2021-12-17 10:52:06,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2021-12-17 10:52:06,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:52:06,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:06,261 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:06,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-17 10:52:06,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:06,461 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2063646399, now seen corresponding path program 21 times [2021-12-17 10:52:06,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:06,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721887069] [2021-12-17 10:52:06,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:06,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:06,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721887069] [2021-12-17 10:52:06,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721887069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874876403] [2021-12-17 10:52:06,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:52:06,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:06,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:06,969 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:06,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-17 10:52:07,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-17 10:52:07,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:07,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 10:52:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:07,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:08,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874876403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:08,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:08,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 76 [2021-12-17 10:52:08,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397478406] [2021-12-17 10:52:08,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:08,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-17 10:52:08,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:08,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-17 10:52:08,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1013, Invalid=4687, Unknown=0, NotChecked=0, Total=5700 [2021-12-17 10:52:08,589 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:09,909 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2021-12-17 10:52:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 10:52:09,909 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 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 63 [2021-12-17 10:52:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:09,910 INFO L225 Difference]: With dead ends: 173 [2021-12-17 10:52:09,910 INFO L226 Difference]: Without dead ends: 136 [2021-12-17 10:52:09,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3531 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1797, Invalid=7323, Unknown=0, NotChecked=0, Total=9120 [2021-12-17 10:52:09,911 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 270 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:09,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 187 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-17 10:52:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2021-12-17 10:52:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 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) [2021-12-17 10:52:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-12-17 10:52:09,927 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 63 [2021-12-17 10:52:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:09,927 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-12-17 10:52:09,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-12-17 10:52:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:52:09,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:09,928 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:09,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-17 10:52:10,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-17 10:52:10,128 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:10,129 INFO L85 PathProgramCache]: Analyzing trace with hash -14509443, now seen corresponding path program 21 times [2021-12-17 10:52:10,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:10,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838781144] [2021-12-17 10:52:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:10,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:10,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:10,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838781144] [2021-12-17 10:52:10,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838781144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:10,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546507349] [2021-12-17 10:52:10,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:52:10,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:10,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:10,698 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:10,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-17 10:52:10,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-17 10:52:10,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 10:52:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:11,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:12,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546507349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:12,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:12,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 75 [2021-12-17 10:52:12,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977539961] [2021-12-17 10:52:12,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:12,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-17 10:52:12,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:12,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-17 10:52:12,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=4534, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 10:52:12,171 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:12,954 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-12-17 10:52:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 10:52:12,954 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 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 63 [2021-12-17 10:52:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:12,954 INFO L225 Difference]: With dead ends: 119 [2021-12-17 10:52:12,954 INFO L226 Difference]: Without dead ends: 113 [2021-12-17 10:52:12,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3523 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2143, Invalid=6413, Unknown=0, NotChecked=0, Total=8556 [2021-12-17 10:52:12,955 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 200 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:12,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 158 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:52:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-17 10:52:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2021-12-17 10:52:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-12-17 10:52:12,968 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 63 [2021-12-17 10:52:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:12,968 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-12-17 10:52:12,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-12-17 10:52:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 10:52:12,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:12,969 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:12,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-17 10:52:13,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-17 10:52:13,180 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash 990392031, now seen corresponding path program 22 times [2021-12-17 10:52:13,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:13,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721476194] [2021-12-17 10:52:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:13,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:13,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:13,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721476194] [2021-12-17 10:52:13,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721476194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:13,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802851076] [2021-12-17 10:52:13,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:52:13,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:13,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:13,658 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:13,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-17 10:52:13,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:52:13,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:52:13,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:14,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:15,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802851076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:15,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:15,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2021-12-17 10:52:15,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295828399] [2021-12-17 10:52:15,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:15,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-17 10:52:15,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-17 10:52:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=4388, Unknown=0, NotChecked=0, Total=5402 [2021-12-17 10:52:15,186 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:16,099 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2021-12-17 10:52:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 10:52:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 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 65 [2021-12-17 10:52:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:16,099 INFO L225 Difference]: With dead ends: 135 [2021-12-17 10:52:16,099 INFO L226 Difference]: Without dead ends: 98 [2021-12-17 10:52:16,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3216 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1688, Invalid=6502, Unknown=0, NotChecked=0, Total=8190 [2021-12-17 10:52:16,100 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:16,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 125 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-17 10:52:16,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-12-17 10:52:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 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) [2021-12-17 10:52:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-12-17 10:52:16,112 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 65 [2021-12-17 10:52:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:16,112 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-12-17 10:52:16,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-12-17 10:52:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 10:52:16,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:16,112 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:16,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-17 10:52:16,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-17 10:52:16,313 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:16,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2056259649, now seen corresponding path program 22 times [2021-12-17 10:52:16,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:16,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014856239] [2021-12-17 10:52:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:16,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:16,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:16,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014856239] [2021-12-17 10:52:16,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014856239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:16,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688600369] [2021-12-17 10:52:16,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:52:16,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:16,880 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:16,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-17 10:52:16,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:52:16,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:52:16,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:17,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:18,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688600369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:18,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:18,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2021-12-17 10:52:18,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558617413] [2021-12-17 10:52:18,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:18,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-17 10:52:18,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-17 10:52:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=4376, Unknown=0, NotChecked=0, Total=5402 [2021-12-17 10:52:18,329 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:18,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:18,935 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2021-12-17 10:52:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 10:52:18,936 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 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 65 [2021-12-17 10:52:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:18,937 INFO L225 Difference]: With dead ends: 107 [2021-12-17 10:52:18,937 INFO L226 Difference]: Without dead ends: 101 [2021-12-17 10:52:18,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3352 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2065, Invalid=5945, Unknown=0, NotChecked=0, Total=8010 [2021-12-17 10:52:18,937 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 298 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:18,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 51 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-17 10:52:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-12-17 10:52:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2021-12-17 10:52:18,959 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 65 [2021-12-17 10:52:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:18,959 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2021-12-17 10:52:18,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2021-12-17 10:52:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:52:18,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:18,960 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:18,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-17 10:52:19,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:19,176 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash -104661983, now seen corresponding path program 23 times [2021-12-17 10:52:19,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:19,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66801920] [2021-12-17 10:52:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:19,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:19,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:19,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66801920] [2021-12-17 10:52:19,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66801920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798618344] [2021-12-17 10:52:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:52:19,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:19,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:19,724 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:19,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-17 10:52:19,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-17 10:52:19,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:19,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 10:52:19,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:20,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:21,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798618344] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:21,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:21,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 81 [2021-12-17 10:52:21,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932912033] [2021-12-17 10:52:21,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:21,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-17 10:52:21,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-17 10:52:21,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=5329, Unknown=0, NotChecked=0, Total=6480 [2021-12-17 10:52:21,557 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:23,018 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2021-12-17 10:52:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 10:52:23,019 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 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 67 [2021-12-17 10:52:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:23,019 INFO L225 Difference]: With dead ends: 183 [2021-12-17 10:52:23,019 INFO L226 Difference]: Without dead ends: 144 [2021-12-17 10:52:23,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4018 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2024, Invalid=8278, Unknown=0, NotChecked=0, Total=10302 [2021-12-17 10:52:23,021 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 204 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:23,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 113 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:52:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-17 10:52:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-12-17 10:52:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:23,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-12-17 10:52:23,035 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 67 [2021-12-17 10:52:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:23,035 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-12-17 10:52:23,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-12-17 10:52:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:52:23,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:23,036 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:23,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-17 10:52:23,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:23,243 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash -500875811, now seen corresponding path program 23 times [2021-12-17 10:52:23,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:23,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191261908] [2021-12-17 10:52:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:23,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:23,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:23,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191261908] [2021-12-17 10:52:23,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191261908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:23,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400871555] [2021-12-17 10:52:23,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:52:23,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:23,841 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:23,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-17 10:52:23,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-17 10:52:23,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:23,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 10:52:23,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:24,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:25,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400871555] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:25,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:25,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 80 [2021-12-17 10:52:25,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463030809] [2021-12-17 10:52:25,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:25,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-17 10:52:25,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:25,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-17 10:52:25,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=5165, Unknown=0, NotChecked=0, Total=6320 [2021-12-17 10:52:25,457 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:26,232 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-12-17 10:52:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 10:52:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 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 67 [2021-12-17 10:52:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:26,233 INFO L225 Difference]: With dead ends: 125 [2021-12-17 10:52:26,233 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 10:52:26,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4024 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2428, Invalid=7274, Unknown=0, NotChecked=0, Total=9702 [2021-12-17 10:52:26,233 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 362 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:26,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 102 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 10:52:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2021-12-17 10:52:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-12-17 10:52:26,252 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 67 [2021-12-17 10:52:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:26,252 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-12-17 10:52:26,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-12-17 10:52:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 10:52:26,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:26,253 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:26,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-17 10:52:26,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:26,470 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:26,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:26,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1743747647, now seen corresponding path program 24 times [2021-12-17 10:52:26,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:26,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630059367] [2021-12-17 10:52:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:26,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:27,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630059367] [2021-12-17 10:52:27,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630059367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008969015] [2021-12-17 10:52:27,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:52:27,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:27,030 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:27,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-17 10:52:27,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-17 10:52:27,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:52:27,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:28,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:28,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008969015] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:28,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:28,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2021-12-17 10:52:28,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4107755] [2021-12-17 10:52:28,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:28,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-17 10:52:28,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:28,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-17 10:52:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=5009, Unknown=0, NotChecked=0, Total=6162 [2021-12-17 10:52:28,685 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:29,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:29,672 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2021-12-17 10:52:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 10:52:29,672 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 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 69 [2021-12-17 10:52:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:29,673 INFO L225 Difference]: With dead ends: 143 [2021-12-17 10:52:29,673 INFO L226 Difference]: Without dead ends: 104 [2021-12-17 10:52:29,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1911, Invalid=7401, Unknown=0, NotChecked=0, Total=9312 [2021-12-17 10:52:29,674 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 126 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:29,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 146 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:52:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-17 10:52:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-12-17 10:52:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2021-12-17 10:52:29,687 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 69 [2021-12-17 10:52:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:29,688 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2021-12-17 10:52:29,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2021-12-17 10:52:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 10:52:29,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:29,689 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:29,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-17 10:52:29,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-17 10:52:29,903 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1306018719, now seen corresponding path program 24 times [2021-12-17 10:52:29,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:29,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231228239] [2021-12-17 10:52:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:29,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:30,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:30,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231228239] [2021-12-17 10:52:30,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231228239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:30,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130331850] [2021-12-17 10:52:30,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:52:30,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:30,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:30,511 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:30,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-17 10:52:30,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-17 10:52:30,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:30,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:52:30,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:31,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:32,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130331850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:32,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:32,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2021-12-17 10:52:32,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773355038] [2021-12-17 10:52:32,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:32,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-17 10:52:32,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:32,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-17 10:52:32,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=4996, Unknown=0, NotChecked=0, Total=6162 [2021-12-17 10:52:32,058 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:32,722 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2021-12-17 10:52:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 10:52:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 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 69 [2021-12-17 10:52:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:32,723 INFO L225 Difference]: With dead ends: 113 [2021-12-17 10:52:32,723 INFO L226 Difference]: Without dead ends: 107 [2021-12-17 10:52:32,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=6774, Unknown=0, NotChecked=0, Total=9120 [2021-12-17 10:52:32,724 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 359 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:32,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 65 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:32,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-17 10:52:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2021-12-17 10:52:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2021-12-17 10:52:32,737 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 69 [2021-12-17 10:52:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:32,737 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2021-12-17 10:52:32,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2021-12-17 10:52:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:52:32,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:32,738 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:32,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-17 10:52:32,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-17 10:52:32,938 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:32,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1229443073, now seen corresponding path program 25 times [2021-12-17 10:52:32,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:32,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138964665] [2021-12-17 10:52:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:32,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:33,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138964665] [2021-12-17 10:52:33,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138964665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34827248] [2021-12-17 10:52:33,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:52:33,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:33,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:33,540 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:33,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-17 10:52:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:33,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 10:52:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:34,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:35,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34827248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:35,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:35,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 86 [2021-12-17 10:52:35,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095368618] [2021-12-17 10:52:35,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:35,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-17 10:52:35,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-17 10:52:35,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=6012, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 10:52:35,478 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:37,009 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2021-12-17 10:52:37,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 10:52:37,010 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 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 71 [2021-12-17 10:52:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:37,010 INFO L225 Difference]: With dead ends: 193 [2021-12-17 10:52:37,010 INFO L226 Difference]: Without dead ends: 152 [2021-12-17 10:52:37,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4536 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2265, Invalid=9291, Unknown=0, NotChecked=0, Total=11556 [2021-12-17 10:52:37,011 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 355 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:37,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 116 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:37,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-17 10:52:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2021-12-17 10:52:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-12-17 10:52:37,027 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 71 [2021-12-17 10:52:37,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:37,027 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-12-17 10:52:37,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-12-17 10:52:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:52:37,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:37,028 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:37,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-17 10:52:37,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-17 10:52:37,244 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:37,244 INFO L85 PathProgramCache]: Analyzing trace with hash 198236733, now seen corresponding path program 25 times [2021-12-17 10:52:37,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:37,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845359543] [2021-12-17 10:52:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:37,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:37,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:37,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845359543] [2021-12-17 10:52:37,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845359543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:37,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472423335] [2021-12-17 10:52:37,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:52:37,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:37,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:37,891 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:37,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-17 10:52:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 10:52:37,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:38,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:39,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472423335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:39,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:39,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 85 [2021-12-17 10:52:39,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090666934] [2021-12-17 10:52:39,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:39,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-17 10:52:39,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-17 10:52:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=5837, Unknown=0, NotChecked=0, Total=7140 [2021-12-17 10:52:39,650 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:40,469 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2021-12-17 10:52:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 10:52:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 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 71 [2021-12-17 10:52:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:40,470 INFO L225 Difference]: With dead ends: 131 [2021-12-17 10:52:40,470 INFO L226 Difference]: Without dead ends: 125 [2021-12-17 10:52:40,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4558 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2731, Invalid=8189, Unknown=0, NotChecked=0, Total=10920 [2021-12-17 10:52:40,471 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 399 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:40,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 62 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-17 10:52:40,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-12-17 10:52:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-12-17 10:52:40,485 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 71 [2021-12-17 10:52:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:40,486 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-12-17 10:52:40,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:40,486 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-12-17 10:52:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 10:52:40,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:40,486 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:40,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-17 10:52:40,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-17 10:52:40,687 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:40,687 INFO L85 PathProgramCache]: Analyzing trace with hash -718963041, now seen corresponding path program 26 times [2021-12-17 10:52:40,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:40,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663617016] [2021-12-17 10:52:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:40,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 198 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:41,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:41,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663617016] [2021-12-17 10:52:41,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663617016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:41,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853624553] [2021-12-17 10:52:41,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:52:41,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:41,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:41,356 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:41,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-17 10:52:41,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:52:41,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:52:41,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:42,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:43,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853624553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:43,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:43,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2021-12-17 10:52:43,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498248142] [2021-12-17 10:52:43,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:43,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-17 10:52:43,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:43,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-17 10:52:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=5671, Unknown=0, NotChecked=0, Total=6972 [2021-12-17 10:52:43,153 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:44,219 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2021-12-17 10:52:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 10:52:44,219 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 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 73 [2021-12-17 10:52:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:44,219 INFO L225 Difference]: With dead ends: 151 [2021-12-17 10:52:44,219 INFO L226 Difference]: Without dead ends: 110 [2021-12-17 10:52:44,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4175 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2148, Invalid=8358, Unknown=0, NotChecked=0, Total=10506 [2021-12-17 10:52:44,220 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 161 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:44,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 95 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:44,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-17 10:52:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-12-17 10:52:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:44,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2021-12-17 10:52:44,235 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 73 [2021-12-17 10:52:44,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:44,235 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2021-12-17 10:52:44,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:44,236 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2021-12-17 10:52:44,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 10:52:44,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:44,236 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:44,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-12-17 10:52:44,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-17 10:52:44,436 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:44,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2052139135, now seen corresponding path program 26 times [2021-12-17 10:52:44,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:44,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265398990] [2021-12-17 10:52:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:44,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 169 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:45,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:45,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265398990] [2021-12-17 10:52:45,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265398990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:45,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741246827] [2021-12-17 10:52:45,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:52:45,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:45,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:45,107 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:45,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-17 10:52:45,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:52:45,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:45,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:52:45,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:46,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:46,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741246827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:46,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:46,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2021-12-17 10:52:46,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143096747] [2021-12-17 10:52:46,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:46,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-17 10:52:46,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:46,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-17 10:52:46,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=5657, Unknown=0, NotChecked=0, Total=6972 [2021-12-17 10:52:46,827 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:47,536 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-12-17 10:52:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 10:52:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 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 73 [2021-12-17 10:52:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:47,537 INFO L225 Difference]: With dead ends: 119 [2021-12-17 10:52:47,537 INFO L226 Difference]: Without dead ends: 113 [2021-12-17 10:52:47,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4361 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2645, Invalid=7657, Unknown=0, NotChecked=0, Total=10302 [2021-12-17 10:52:47,537 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 204 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:47,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 74 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:52:47,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-17 10:52:47,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-12-17 10:52:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2021-12-17 10:52:47,556 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 73 [2021-12-17 10:52:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:47,556 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2021-12-17 10:52:47,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2021-12-17 10:52:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:52:47,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:47,556 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:47,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-17 10:52:47,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-17 10:52:47,761 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:47,761 INFO L85 PathProgramCache]: Analyzing trace with hash 991624417, now seen corresponding path program 27 times [2021-12-17 10:52:47,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:47,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228543544] [2021-12-17 10:52:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:47,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:48,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:48,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228543544] [2021-12-17 10:52:48,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228543544] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:48,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871121337] [2021-12-17 10:52:48,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:52:48,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:48,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:48,395 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:48,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-17 10:52:48,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 10:52:48,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:48,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 10:52:48,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:49,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:50,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871121337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:50,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:50,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 91 [2021-12-17 10:52:50,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543042028] [2021-12-17 10:52:50,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:50,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-17 10:52:50,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-17 10:52:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1454, Invalid=6736, Unknown=0, NotChecked=0, Total=8190 [2021-12-17 10:52:50,487 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:52,218 INFO L93 Difference]: Finished difference Result 203 states and 208 transitions. [2021-12-17 10:52:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 10:52:52,218 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 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 75 [2021-12-17 10:52:52,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:52,219 INFO L225 Difference]: With dead ends: 203 [2021-12-17 10:52:52,219 INFO L226 Difference]: Without dead ends: 160 [2021-12-17 10:52:52,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5085 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2520, Invalid=10362, Unknown=0, NotChecked=0, Total=12882 [2021-12-17 10:52:52,220 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 238 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:52,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 90 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:52:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-17 10:52:52,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2021-12-17 10:52:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2021-12-17 10:52:52,236 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 75 [2021-12-17 10:52:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:52,236 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2021-12-17 10:52:52,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2021-12-17 10:52:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:52:52,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:52,237 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:52,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-17 10:52:52,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:52,448 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash -382029923, now seen corresponding path program 27 times [2021-12-17 10:52:52,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:52,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841416774] [2021-12-17 10:52:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:52,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:53,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:53,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841416774] [2021-12-17 10:52:53,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841416774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:53,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370336067] [2021-12-17 10:52:53,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:52:53,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:53,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:53,158 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:53,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-17 10:52:53,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 10:52:53,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:53,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 10:52:53,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:54,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:55,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370336067] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:55,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:55,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 90 [2021-12-17 10:52:55,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685420417] [2021-12-17 10:52:55,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:55,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-17 10:52:55,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-17 10:52:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=6550, Unknown=0, NotChecked=0, Total=8010 [2021-12-17 10:52:55,074 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:52:55,979 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2021-12-17 10:52:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 10:52:55,979 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 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 75 [2021-12-17 10:52:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:52:55,980 INFO L225 Difference]: With dead ends: 137 [2021-12-17 10:52:55,980 INFO L226 Difference]: Without dead ends: 131 [2021-12-17 10:52:55,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5125 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3052, Invalid=9158, Unknown=0, NotChecked=0, Total=12210 [2021-12-17 10:52:55,980 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 212 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:52:55,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 140 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:52:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-17 10:52:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2021-12-17 10:52:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:56,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-12-17 10:52:56,002 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 75 [2021-12-17 10:52:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:52:56,002 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-12-17 10:52:56,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:52:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-12-17 10:52:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 10:52:56,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:52:56,003 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:52:56,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-17 10:52:56,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:56,203 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:52:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:52:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash -9470977, now seen corresponding path program 28 times [2021-12-17 10:52:56,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:52:56,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659794954] [2021-12-17 10:52:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:52:56,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:52:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:52:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 227 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:56,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:52:56,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659794954] [2021-12-17 10:52:56,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659794954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:52:56,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754856166] [2021-12-17 10:52:56,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:52:56,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:52:56,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:52:56,801 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:52:56,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-17 10:52:56,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:52:56,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:52:56,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:52:56,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:52:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:58,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:52:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:52:58,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754856166] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:52:58,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:52:58,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 89 [2021-12-17 10:52:58,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098808511] [2021-12-17 10:52:58,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:52:58,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-17 10:52:58,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:52:58,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-17 10:52:58,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1458, Invalid=6374, Unknown=0, NotChecked=0, Total=7832 [2021-12-17 10:52:58,822 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:00,024 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2021-12-17 10:53:00,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 10:53:00,024 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 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 77 [2021-12-17 10:53:00,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:00,025 INFO L225 Difference]: With dead ends: 159 [2021-12-17 10:53:00,025 INFO L226 Difference]: Without dead ends: 116 [2021-12-17 10:53:00,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4701 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2399, Invalid=9373, Unknown=0, NotChecked=0, Total=11772 [2021-12-17 10:53:00,026 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:00,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 154 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:53:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-17 10:53:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-12-17 10:53:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2021-12-17 10:53:00,050 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 77 [2021-12-17 10:53:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:00,051 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2021-12-17 10:53:00,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2021-12-17 10:53:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 10:53:00,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:00,052 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:00,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-17 10:53:00,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:00,259 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:00,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1633163681, now seen corresponding path program 28 times [2021-12-17 10:53:00,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:00,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548174351] [2021-12-17 10:53:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:00,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 196 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:00,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548174351] [2021-12-17 10:53:00,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548174351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339525633] [2021-12-17 10:53:00,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:53:00,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:00,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:00,984 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:00,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-17 10:53:01,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:53:01,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:01,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:53:01,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:02,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:02,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339525633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:02,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:02,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 89 [2021-12-17 10:53:02,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390175913] [2021-12-17 10:53:02,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:02,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-17 10:53:02,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-17 10:53:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=6359, Unknown=0, NotChecked=0, Total=7832 [2021-12-17 10:53:02,841 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:03,619 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-12-17 10:53:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 10:53:03,619 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 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 77 [2021-12-17 10:53:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:03,620 INFO L225 Difference]: With dead ends: 125 [2021-12-17 10:53:03,620 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 10:53:03,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4915 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2962, Invalid=8594, Unknown=0, NotChecked=0, Total=11556 [2021-12-17 10:53:03,621 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 271 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:03,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 77 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:53:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 10:53:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-12-17 10:53:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2021-12-17 10:53:03,642 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 77 [2021-12-17 10:53:03,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:03,642 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2021-12-17 10:53:03,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2021-12-17 10:53:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:53:03,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:03,642 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:03,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-17 10:53:03,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-17 10:53:03,848 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1531329855, now seen corresponding path program 29 times [2021-12-17 10:53:03,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:03,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569878251] [2021-12-17 10:53:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:03,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:04,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569878251] [2021-12-17 10:53:04,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569878251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523964406] [2021-12-17 10:53:04,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:53:04,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:04,502 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:04,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-17 10:53:04,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-17 10:53:04,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:04,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 10:53:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:05,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:06,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523964406] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:06,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:06,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 96 [2021-12-17 10:53:06,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879574040] [2021-12-17 10:53:06,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:06,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-17 10:53:06,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:06,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-17 10:53:06,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1619, Invalid=7501, Unknown=0, NotChecked=0, Total=9120 [2021-12-17 10:53:06,772 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:08,529 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2021-12-17 10:53:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-17 10:53:08,529 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 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 79 [2021-12-17 10:53:08,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:08,530 INFO L225 Difference]: With dead ends: 213 [2021-12-17 10:53:08,530 INFO L226 Difference]: Without dead ends: 168 [2021-12-17 10:53:08,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5665 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2789, Invalid=11491, Unknown=0, NotChecked=0, Total=14280 [2021-12-17 10:53:08,531 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 194 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:08,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 146 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:53:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-17 10:53:08,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2021-12-17 10:53:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:08,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-12-17 10:53:08,549 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 79 [2021-12-17 10:53:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:08,549 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-12-17 10:53:08,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-12-17 10:53:08,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:53:08,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:08,549 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:08,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-12-17 10:53:08,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-17 10:53:08,758 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:08,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1285030403, now seen corresponding path program 29 times [2021-12-17 10:53:08,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:08,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202372035] [2021-12-17 10:53:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:08,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:09,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:09,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202372035] [2021-12-17 10:53:09,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202372035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:09,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894325153] [2021-12-17 10:53:09,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:53:09,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:09,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:09,521 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:09,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-17 10:53:09,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-17 10:53:09,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 10:53:09,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:10,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:11,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894325153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:11,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:11,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 95 [2021-12-17 10:53:11,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626465417] [2021-12-17 10:53:11,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:11,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-17 10:53:11,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:11,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-17 10:53:11,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2021-12-17 10:53:11,560 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:12,488 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2021-12-17 10:53:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 10:53:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 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 79 [2021-12-17 10:53:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:12,489 INFO L225 Difference]: With dead ends: 143 [2021-12-17 10:53:12,489 INFO L226 Difference]: Without dead ends: 137 [2021-12-17 10:53:12,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5725 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3391, Invalid=10181, Unknown=0, NotChecked=0, Total=13572 [2021-12-17 10:53:12,490 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 274 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:12,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 116 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:53:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-17 10:53:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 122. [2021-12-17 10:53:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-12-17 10:53:12,508 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 79 [2021-12-17 10:53:12,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:12,508 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-12-17 10:53:12,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:12,508 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-12-17 10:53:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-17 10:53:12,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:12,509 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:12,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-17 10:53:12,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:12,709 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash -209538465, now seen corresponding path program 30 times [2021-12-17 10:53:12,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:12,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965200900] [2021-12-17 10:53:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:12,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 258 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:13,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:13,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965200900] [2021-12-17 10:53:13,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965200900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:13,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159609952] [2021-12-17 10:53:13,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:53:13,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:13,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:13,356 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:13,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-17 10:53:13,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-17 10:53:13,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:53:13,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:14,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:15,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159609952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:15,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:15,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 94 [2021-12-17 10:53:15,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422165834] [2021-12-17 10:53:15,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:15,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-17 10:53:15,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:15,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-17 10:53:15,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1624, Invalid=7118, Unknown=0, NotChecked=0, Total=8742 [2021-12-17 10:53:15,487 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:16,794 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2021-12-17 10:53:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 10:53:16,795 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 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 81 [2021-12-17 10:53:16,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:16,795 INFO L225 Difference]: With dead ends: 167 [2021-12-17 10:53:16,795 INFO L226 Difference]: Without dead ends: 122 [2021-12-17 10:53:16,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5258 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2664, Invalid=10446, Unknown=0, NotChecked=0, Total=13110 [2021-12-17 10:53:16,796 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 144 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:16,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 125 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:53:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-17 10:53:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-12-17 10:53:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2021-12-17 10:53:16,815 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 81 [2021-12-17 10:53:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:16,815 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2021-12-17 10:53:16,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2021-12-17 10:53:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-17 10:53:16,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:16,815 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:16,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-12-17 10:53:17,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:17,016 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1016708415, now seen corresponding path program 30 times [2021-12-17 10:53:17,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:17,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504117837] [2021-12-17 10:53:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:17,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 225 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:17,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:17,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504117837] [2021-12-17 10:53:17,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504117837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:17,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049647086] [2021-12-17 10:53:17,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:53:17,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:17,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:17,785 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:17,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-17 10:53:17,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-17 10:53:17,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:17,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:53:17,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:18,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:19,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049647086] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:19,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:19,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 94 [2021-12-17 10:53:19,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779941021] [2021-12-17 10:53:19,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:19,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-17 10:53:19,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:19,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-17 10:53:19,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1640, Invalid=7102, Unknown=0, NotChecked=0, Total=8742 [2021-12-17 10:53:19,765 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:20,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:20,583 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2021-12-17 10:53:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 10:53:20,583 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 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 81 [2021-12-17 10:53:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:20,584 INFO L225 Difference]: With dead ends: 131 [2021-12-17 10:53:20,584 INFO L226 Difference]: Without dead ends: 125 [2021-12-17 10:53:20,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5502 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3297, Invalid=9585, Unknown=0, NotChecked=0, Total=12882 [2021-12-17 10:53:20,585 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 313 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:20,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 62 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:53:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-17 10:53:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-12-17 10:53:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2021-12-17 10:53:20,607 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 81 [2021-12-17 10:53:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:20,607 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2021-12-17 10:53:20,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2021-12-17 10:53:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:53:20,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:20,607 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:20,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-17 10:53:20,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-17 10:53:20,808 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:20,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1919852127, now seen corresponding path program 31 times [2021-12-17 10:53:20,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:20,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83320880] [2021-12-17 10:53:20,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:20,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:21,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:21,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83320880] [2021-12-17 10:53:21,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83320880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:21,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799216065] [2021-12-17 10:53:21,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:53:21,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:21,624 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:21,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-17 10:53:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:21,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-17 10:53:21,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:23,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:24,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799216065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:24,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:24,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 101 [2021-12-17 10:53:24,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134356532] [2021-12-17 10:53:24,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:24,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-17 10:53:24,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:24,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-17 10:53:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1793, Invalid=8307, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 10:53:24,037 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:26,012 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2021-12-17 10:53:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 10:53:26,013 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 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 83 [2021-12-17 10:53:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:26,013 INFO L225 Difference]: With dead ends: 223 [2021-12-17 10:53:26,013 INFO L226 Difference]: Without dead ends: 176 [2021-12-17 10:53:26,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6276 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3072, Invalid=12678, Unknown=0, NotChecked=0, Total=15750 [2021-12-17 10:53:26,014 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 334 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:26,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 131 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:53:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-17 10:53:26,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2021-12-17 10:53:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-12-17 10:53:26,034 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 83 [2021-12-17 10:53:26,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:26,034 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-12-17 10:53:26,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-12-17 10:53:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:53:26,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:26,035 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:26,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-17 10:53:26,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-17 10:53:26,235 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:26,236 INFO L85 PathProgramCache]: Analyzing trace with hash 323880285, now seen corresponding path program 31 times [2021-12-17 10:53:26,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:26,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869277044] [2021-12-17 10:53:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:26,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:27,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:27,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869277044] [2021-12-17 10:53:27,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869277044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:27,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676486369] [2021-12-17 10:53:27,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:53:27,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:27,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:27,108 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:27,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-17 10:53:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:27,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-17 10:53:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:28,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:29,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676486369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:29,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:29,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 100 [2021-12-17 10:53:29,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823133505] [2021-12-17 10:53:29,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:29,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-17 10:53:29,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:29,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-17 10:53:29,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1801, Invalid=8099, Unknown=0, NotChecked=0, Total=9900 [2021-12-17 10:53:29,304 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:30,340 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2021-12-17 10:53:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 10:53:30,340 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 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 83 [2021-12-17 10:53:30,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:30,340 INFO L225 Difference]: With dead ends: 149 [2021-12-17 10:53:30,340 INFO L226 Difference]: Without dead ends: 143 [2021-12-17 10:53:30,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6358 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3748, Invalid=11258, Unknown=0, NotChecked=0, Total=15006 [2021-12-17 10:53:30,341 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 256 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:30,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 112 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:53:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-17 10:53:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 128. [2021-12-17 10:53:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2021-12-17 10:53:30,371 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 83 [2021-12-17 10:53:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:30,371 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2021-12-17 10:53:30,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2021-12-17 10:53:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 10:53:30,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:30,372 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:30,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-17 10:53:30,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:30,579 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -234593857, now seen corresponding path program 32 times [2021-12-17 10:53:30,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668617077] [2021-12-17 10:53:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:30,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 291 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:31,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:31,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668617077] [2021-12-17 10:53:31,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668617077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:31,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131001953] [2021-12-17 10:53:31,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:53:31,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:31,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:31,263 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:31,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-17 10:53:31,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:53:31,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:31,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:53:31,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:32,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:33,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131001953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:33,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:33,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 99 [2021-12-17 10:53:33,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284528572] [2021-12-17 10:53:33,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:33,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-17 10:53:33,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:33,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-17 10:53:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1799, Invalid=7903, Unknown=0, NotChecked=0, Total=9702 [2021-12-17 10:53:33,559 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:34,857 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2021-12-17 10:53:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 10:53:34,857 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 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 85 [2021-12-17 10:53:34,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:34,859 INFO L225 Difference]: With dead ends: 175 [2021-12-17 10:53:34,859 INFO L226 Difference]: Without dead ends: 128 [2021-12-17 10:53:34,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5846 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2943, Invalid=11577, Unknown=0, NotChecked=0, Total=14520 [2021-12-17 10:53:34,861 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 121 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:34,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 153 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:53:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-17 10:53:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-12-17 10:53:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2021-12-17 10:53:34,884 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 85 [2021-12-17 10:53:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:34,884 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2021-12-17 10:53:34,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2021-12-17 10:53:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 10:53:34,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:34,885 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:34,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-12-17 10:53:35,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-17 10:53:35,099 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:35,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:35,100 INFO L85 PathProgramCache]: Analyzing trace with hash -405541601, now seen corresponding path program 32 times [2021-12-17 10:53:35,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:35,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957547582] [2021-12-17 10:53:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:35,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 256 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:35,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:35,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957547582] [2021-12-17 10:53:35,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957547582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:35,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805155330] [2021-12-17 10:53:35,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:53:35,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:35,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:35,936 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:35,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-17 10:53:35,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:53:35,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:35,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:53:35,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:37,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:38,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805155330] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:38,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:38,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 99 [2021-12-17 10:53:38,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761001360] [2021-12-17 10:53:38,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:38,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-17 10:53:38,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:38,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-17 10:53:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1816, Invalid=7886, Unknown=0, NotChecked=0, Total=9702 [2021-12-17 10:53:38,134 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:39,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:39,078 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2021-12-17 10:53:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 10:53:39,078 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 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 85 [2021-12-17 10:53:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:39,079 INFO L225 Difference]: With dead ends: 137 [2021-12-17 10:53:39,079 INFO L226 Difference]: Without dead ends: 131 [2021-12-17 10:53:39,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6122 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3650, Invalid=10630, Unknown=0, NotChecked=0, Total=14280 [2021-12-17 10:53:39,080 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 228 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:39,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 96 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:53:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-17 10:53:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2021-12-17 10:53:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2021-12-17 10:53:39,101 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 85 [2021-12-17 10:53:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:39,101 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2021-12-17 10:53:39,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2021-12-17 10:53:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 10:53:39,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:39,102 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:39,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-17 10:53:39,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:39,315 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:39,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1392449921, now seen corresponding path program 33 times [2021-12-17 10:53:39,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:39,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862215804] [2021-12-17 10:53:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:39,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:40,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:40,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862215804] [2021-12-17 10:53:40,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862215804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:40,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128706975] [2021-12-17 10:53:40,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:53:40,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:40,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:40,065 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:40,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-17 10:53:40,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-17 10:53:40,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:40,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 10:53:40,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:41,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:42,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128706975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:42,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:42,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 106 [2021-12-17 10:53:42,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960202426] [2021-12-17 10:53:42,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:42,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-12-17 10:53:42,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-12-17 10:53:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1976, Invalid=9154, Unknown=0, NotChecked=0, Total=11130 [2021-12-17 10:53:42,683 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:45,084 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2021-12-17 10:53:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 10:53:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 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 87 [2021-12-17 10:53:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:45,085 INFO L225 Difference]: With dead ends: 233 [2021-12-17 10:53:45,085 INFO L226 Difference]: Without dead ends: 184 [2021-12-17 10:53:45,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6918 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3369, Invalid=13923, Unknown=0, NotChecked=0, Total=17292 [2021-12-17 10:53:45,086 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 254 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:45,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 177 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:53:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-17 10:53:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 132. [2021-12-17 10:53:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-12-17 10:53:45,112 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 87 [2021-12-17 10:53:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:45,112 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-12-17 10:53:45,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-12-17 10:53:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 10:53:45,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:45,113 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:45,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-17 10:53:45,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:45,323 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:45,323 INFO L85 PathProgramCache]: Analyzing trace with hash -976091715, now seen corresponding path program 33 times [2021-12-17 10:53:45,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:45,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423095916] [2021-12-17 10:53:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:45,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:46,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:46,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423095916] [2021-12-17 10:53:46,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423095916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:46,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737624019] [2021-12-17 10:53:46,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:53:46,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:46,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:46,231 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:46,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-17 10:53:46,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-17 10:53:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 10:53:46,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:47,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:48,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737624019] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:48,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:48,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 105 [2021-12-17 10:53:48,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857960313] [2021-12-17 10:53:48,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:48,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-17 10:53:48,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:48,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-17 10:53:48,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1985, Invalid=8935, Unknown=0, NotChecked=0, Total=10920 [2021-12-17 10:53:48,608 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:49,829 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2021-12-17 10:53:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 10:53:49,830 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 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 87 [2021-12-17 10:53:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:49,830 INFO L225 Difference]: With dead ends: 155 [2021-12-17 10:53:49,830 INFO L226 Difference]: Without dead ends: 149 [2021-12-17 10:53:49,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7024 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4123, Invalid=12389, Unknown=0, NotChecked=0, Total=16512 [2021-12-17 10:53:49,831 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 602 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:49,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 117 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:53:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-17 10:53:49,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 134. [2021-12-17 10:53:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2021-12-17 10:53:49,853 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 87 [2021-12-17 10:53:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:49,853 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2021-12-17 10:53:49,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2021-12-17 10:53:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 10:53:49,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:49,853 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:49,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-12-17 10:53:50,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-12-17 10:53:50,054 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:50,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:50,054 INFO L85 PathProgramCache]: Analyzing trace with hash 327797279, now seen corresponding path program 34 times [2021-12-17 10:53:50,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:50,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760146136] [2021-12-17 10:53:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:50,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 326 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:50,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:50,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760146136] [2021-12-17 10:53:50,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760146136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:50,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885704463] [2021-12-17 10:53:50,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:53:50,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:50,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:50,781 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:50,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-17 10:53:50,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:53:50,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:50,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 10:53:50,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:52,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:53,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885704463] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:53,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:53,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2021-12-17 10:53:53,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940049933] [2021-12-17 10:53:53,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:53,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-17 10:53:53,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-17 10:53:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=8729, Unknown=0, NotChecked=0, Total=10712 [2021-12-17 10:53:53,265 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:54,631 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2021-12-17 10:53:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-17 10:53:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 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 89 [2021-12-17 10:53:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:54,632 INFO L225 Difference]: With dead ends: 183 [2021-12-17 10:53:54,632 INFO L226 Difference]: Without dead ends: 134 [2021-12-17 10:53:54,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6465 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3236, Invalid=12766, Unknown=0, NotChecked=0, Total=16002 [2021-12-17 10:53:54,633 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 185 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:54,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 117 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:53:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-17 10:53:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-17 10:53:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2021-12-17 10:53:54,656 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 89 [2021-12-17 10:53:54,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:54,656 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2021-12-17 10:53:54,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:54,656 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2021-12-17 10:53:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 10:53:54,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:54,657 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:54,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-17 10:53:54,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:54,863 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1777579519, now seen corresponding path program 34 times [2021-12-17 10:53:54,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:54,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303045009] [2021-12-17 10:53:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:54,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:53:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 289 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:55,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:53:55,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303045009] [2021-12-17 10:53:55,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303045009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:53:55,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825080778] [2021-12-17 10:53:55,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:53:55,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:55,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:53:55,811 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:53:55,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-17 10:53:55,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:53:55,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:53:55,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 10:53:55,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:53:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:57,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:53:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:53:58,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825080778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:53:58,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:53:58,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2021-12-17 10:53:58,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215652891] [2021-12-17 10:53:58,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:53:58,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-17 10:53:58,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:53:58,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-17 10:53:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2001, Invalid=8711, Unknown=0, NotChecked=0, Total=10712 [2021-12-17 10:53:58,154 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:53:59,133 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2021-12-17 10:53:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 10:53:59,134 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 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 89 [2021-12-17 10:53:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:53:59,134 INFO L225 Difference]: With dead ends: 143 [2021-12-17 10:53:59,134 INFO L226 Difference]: Without dead ends: 137 [2021-12-17 10:53:59,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6775 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4021, Invalid=11729, Unknown=0, NotChecked=0, Total=15750 [2021-12-17 10:53:59,135 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 446 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:53:59,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 72 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:53:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-17 10:53:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-12-17 10:53:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2021-12-17 10:53:59,161 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 89 [2021-12-17 10:53:59,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:53:59,161 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2021-12-17 10:53:59,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:53:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2021-12-17 10:53:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 10:53:59,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:53:59,161 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:53:59,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-17 10:53:59,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:53:59,362 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:53:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:53:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash -867161503, now seen corresponding path program 35 times [2021-12-17 10:53:59,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:53:59,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214260628] [2021-12-17 10:53:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:53:59,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:53:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:00,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:00,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214260628] [2021-12-17 10:54:00,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214260628] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:00,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166383514] [2021-12-17 10:54:00,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:54:00,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:00,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:00,184 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:00,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-17 10:54:00,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-17 10:54:00,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:54:00,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-17 10:54:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:01,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:02,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166383514] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:02,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:02,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 111 [2021-12-17 10:54:02,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067042117] [2021-12-17 10:54:02,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:02,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-12-17 10:54:02,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-12-17 10:54:02,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2168, Invalid=10042, Unknown=0, NotChecked=0, Total=12210 [2021-12-17 10:54:02,997 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:54:05,185 INFO L93 Difference]: Finished difference Result 243 states and 248 transitions. [2021-12-17 10:54:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 10:54:05,185 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 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 91 [2021-12-17 10:54:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:54:05,185 INFO L225 Difference]: With dead ends: 243 [2021-12-17 10:54:05,185 INFO L226 Difference]: Without dead ends: 192 [2021-12-17 10:54:05,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7591 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3680, Invalid=15226, Unknown=0, NotChecked=0, Total=18906 [2021-12-17 10:54:05,186 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 208 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:54:05,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 187 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:54:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-17 10:54:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2021-12-17 10:54:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-12-17 10:54:05,215 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 91 [2021-12-17 10:54:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:54:05,215 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-12-17 10:54:05,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:05,216 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-12-17 10:54:05,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 10:54:05,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:54:05,216 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:54:05,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-12-17 10:54:05,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:05,427 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:54:05,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:54:05,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1070153501, now seen corresponding path program 35 times [2021-12-17 10:54:05,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:54:05,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510206270] [2021-12-17 10:54:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:54:05,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:54:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:06,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510206270] [2021-12-17 10:54:06,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510206270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:06,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479228149] [2021-12-17 10:54:06,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:54:06,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:06,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:06,473 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:06,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-17 10:54:06,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-17 10:54:06,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:54:06,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-17 10:54:06,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:08,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:09,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479228149] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:09,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:09,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 110 [2021-12-17 10:54:09,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371451178] [2021-12-17 10:54:09,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:09,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-17 10:54:09,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-17 10:54:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2178, Invalid=9812, Unknown=0, NotChecked=0, Total=11990 [2021-12-17 10:54:09,018 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:54:10,200 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2021-12-17 10:54:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 10:54:10,200 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 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 91 [2021-12-17 10:54:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:54:10,201 INFO L225 Difference]: With dead ends: 161 [2021-12-17 10:54:10,201 INFO L226 Difference]: Without dead ends: 155 [2021-12-17 10:54:10,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7723 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4516, Invalid=13574, Unknown=0, NotChecked=0, Total=18090 [2021-12-17 10:54:10,202 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 361 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:54:10,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 133 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:54:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-17 10:54:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2021-12-17 10:54:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2021-12-17 10:54:10,234 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 91 [2021-12-17 10:54:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:54:10,234 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2021-12-17 10:54:10,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2021-12-17 10:54:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 10:54:10,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:54:10,235 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:54:10,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-17 10:54:10,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-17 10:54:10,436 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:54:10,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:54:10,436 INFO L85 PathProgramCache]: Analyzing trace with hash -325571713, now seen corresponding path program 36 times [2021-12-17 10:54:10,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:54:10,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074616625] [2021-12-17 10:54:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:54:10,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:54:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 363 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:11,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:11,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074616625] [2021-12-17 10:54:11,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074616625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:11,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784039231] [2021-12-17 10:54:11,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:54:11,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:11,205 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:11,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-17 10:54:11,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-17 10:54:11,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:54:11,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-17 10:54:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:12,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:13,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784039231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:13,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:13,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 109 [2021-12-17 10:54:13,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182554906] [2021-12-17 10:54:13,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:13,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-17 10:54:13,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-17 10:54:13,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2176, Invalid=9596, Unknown=0, NotChecked=0, Total=11772 [2021-12-17 10:54:13,843 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:54:15,400 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2021-12-17 10:54:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 10:54:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 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 93 [2021-12-17 10:54:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:54:15,401 INFO L225 Difference]: With dead ends: 191 [2021-12-17 10:54:15,401 INFO L226 Difference]: Without dead ends: 140 [2021-12-17 10:54:15,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7115 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3543, Invalid=14013, Unknown=0, NotChecked=0, Total=17556 [2021-12-17 10:54:15,402 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 116 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:54:15,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 120 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:54:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-17 10:54:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-12-17 10:54:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2021-12-17 10:54:15,429 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 93 [2021-12-17 10:54:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:54:15,430 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2021-12-17 10:54:15,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2021-12-17 10:54:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 10:54:15,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:54:15,430 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:54:15,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-12-17 10:54:15,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:15,632 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:54:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:54:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash -427403297, now seen corresponding path program 36 times [2021-12-17 10:54:15,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:54:15,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642141735] [2021-12-17 10:54:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:54:15,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:54:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 324 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:16,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:16,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642141735] [2021-12-17 10:54:16,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642141735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:16,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653636673] [2021-12-17 10:54:16,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:54:16,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:16,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:16,592 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:16,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-17 10:54:16,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-17 10:54:16,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:54:16,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-17 10:54:16,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:18,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:19,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653636673] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:19,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:19,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 109 [2021-12-17 10:54:19,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669956829] [2021-12-17 10:54:19,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:19,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-17 10:54:19,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:19,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-17 10:54:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2195, Invalid=9577, Unknown=0, NotChecked=0, Total=11772 [2021-12-17 10:54:19,040 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:19,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:54:19,949 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2021-12-17 10:54:19,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 10:54:19,950 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 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 93 [2021-12-17 10:54:19,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:54:19,950 INFO L225 Difference]: With dead ends: 149 [2021-12-17 10:54:19,950 INFO L226 Difference]: Without dead ends: 143 [2021-12-17 10:54:19,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7461 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4410, Invalid=12882, Unknown=0, NotChecked=0, Total=17292 [2021-12-17 10:54:19,951 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 241 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:54:19,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 29 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:54:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-17 10:54:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-12-17 10:54:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2021-12-17 10:54:19,976 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 93 [2021-12-17 10:54:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:54:19,976 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2021-12-17 10:54:19,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2021-12-17 10:54:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 10:54:19,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:54:19,977 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:54:19,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-12-17 10:54:20,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:20,191 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:54:20,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:54:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1858196545, now seen corresponding path program 37 times [2021-12-17 10:54:20,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:54:20,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901402181] [2021-12-17 10:54:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:54:20,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:54:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:21,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:21,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901402181] [2021-12-17 10:54:21,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901402181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:21,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844190752] [2021-12-17 10:54:21,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:54:21,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:21,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:21,060 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:21,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-17 10:54:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:21,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 10:54:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:22,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:24,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844190752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:24,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:24,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 116 [2021-12-17 10:54:24,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105897372] [2021-12-17 10:54:24,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:24,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-17 10:54:24,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-17 10:54:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2369, Invalid=10971, Unknown=0, NotChecked=0, Total=13340 [2021-12-17 10:54:24,021 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:54:26,349 INFO L93 Difference]: Finished difference Result 253 states and 258 transitions. [2021-12-17 10:54:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 10:54:26,350 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 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 95 [2021-12-17 10:54:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:54:26,350 INFO L225 Difference]: With dead ends: 253 [2021-12-17 10:54:26,350 INFO L226 Difference]: Without dead ends: 200 [2021-12-17 10:54:26,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8295 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4005, Invalid=16587, Unknown=0, NotChecked=0, Total=20592 [2021-12-17 10:54:26,351 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 284 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:54:26,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 155 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:54:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-17 10:54:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2021-12-17 10:54:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2021-12-17 10:54:26,377 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 95 [2021-12-17 10:54:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:54:26,377 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2021-12-17 10:54:26,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2021-12-17 10:54:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 10:54:26,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:54:26,385 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:54:26,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-12-17 10:54:26,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-17 10:54:26,599 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:54:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:54:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1375269245, now seen corresponding path program 37 times [2021-12-17 10:54:26,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:54:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010788173] [2021-12-17 10:54:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:54:26,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:54:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:27,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:27,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010788173] [2021-12-17 10:54:27,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010788173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:27,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280952540] [2021-12-17 10:54:27,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:54:27,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:27,695 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:27,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-17 10:54:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 10:54:27,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:29,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:30,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280952540] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:30,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:30,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 115 [2021-12-17 10:54:30,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078939078] [2021-12-17 10:54:30,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:30,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-12-17 10:54:30,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:30,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-12-17 10:54:30,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2380, Invalid=10730, Unknown=0, NotChecked=0, Total=13110 [2021-12-17 10:54:30,453 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:54:31,676 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-12-17 10:54:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-17 10:54:31,676 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 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 95 [2021-12-17 10:54:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:54:31,677 INFO L225 Difference]: With dead ends: 167 [2021-12-17 10:54:31,677 INFO L226 Difference]: Without dead ends: 161 [2021-12-17 10:54:31,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8455 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4927, Invalid=14813, Unknown=0, NotChecked=0, Total=19740 [2021-12-17 10:54:31,678 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 350 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:54:31,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 96 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:54:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-17 10:54:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 146. [2021-12-17 10:54:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2021-12-17 10:54:31,705 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 95 [2021-12-17 10:54:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:54:31,705 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2021-12-17 10:54:31,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:31,706 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2021-12-17 10:54:31,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 10:54:31,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:54:31,706 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:54:31,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-17 10:54:31,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:31,907 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:54:31,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:54:31,907 INFO L85 PathProgramCache]: Analyzing trace with hash 832882143, now seen corresponding path program 38 times [2021-12-17 10:54:31,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:54:31,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956233887] [2021-12-17 10:54:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:54:31,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:54:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 402 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:32,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:32,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956233887] [2021-12-17 10:54:32,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956233887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:32,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89294723] [2021-12-17 10:54:32,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:54:32,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:32,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:32,724 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:32,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-17 10:54:32,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:54:32,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:54:32,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 10:54:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:34,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:35,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89294723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:35,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:35,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 114 [2021-12-17 10:54:35,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599823247] [2021-12-17 10:54:35,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:35,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-17 10:54:35,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:35,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-17 10:54:35,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2378, Invalid=10504, Unknown=0, NotChecked=0, Total=12882 [2021-12-17 10:54:35,595 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:37,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:54:37,342 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2021-12-17 10:54:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 10:54:37,342 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 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 97 [2021-12-17 10:54:37,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:54:37,343 INFO L225 Difference]: With dead ends: 199 [2021-12-17 10:54:37,343 INFO L226 Difference]: Without dead ends: 146 [2021-12-17 10:54:37,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7796 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3864, Invalid=15318, Unknown=0, NotChecked=0, Total=19182 [2021-12-17 10:54:37,344 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 176 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:54:37,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 109 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:54:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-17 10:54:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-12-17 10:54:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2021-12-17 10:54:37,373 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 97 [2021-12-17 10:54:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:54:37,373 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2021-12-17 10:54:37,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2021-12-17 10:54:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 10:54:37,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:54:37,374 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:54:37,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-12-17 10:54:37,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:37,575 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:54:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:54:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash -16182593, now seen corresponding path program 38 times [2021-12-17 10:54:37,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:54:37,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177917664] [2021-12-17 10:54:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:54:37,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:54:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 361 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:38,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177917664] [2021-12-17 10:54:38,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177917664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569601907] [2021-12-17 10:54:38,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:54:38,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:38,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:38,636 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:38,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-17 10:54:38,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:54:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:54:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 10:54:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:40,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:41,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569601907] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:41,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:41,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 114 [2021-12-17 10:54:41,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798306061] [2021-12-17 10:54:41,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:41,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-17 10:54:41,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-17 10:54:41,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=10484, Unknown=0, NotChecked=0, Total=12882 [2021-12-17 10:54:41,313 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 114 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:54:42,383 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2021-12-17 10:54:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 10:54:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 114 states have internal predecessors, (231), 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 97 [2021-12-17 10:54:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:54:42,384 INFO L225 Difference]: With dead ends: 155 [2021-12-17 10:54:42,384 INFO L226 Difference]: Without dead ends: 149 [2021-12-17 10:54:42,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8180 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4817, Invalid=14089, Unknown=0, NotChecked=0, Total=18906 [2021-12-17 10:54:42,385 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 542 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:54:42,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 55 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:54:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-17 10:54:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-12-17 10:54:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2021-12-17 10:54:42,412 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 97 [2021-12-17 10:54:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:54:42,413 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2021-12-17 10:54:42,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 114 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2021-12-17 10:54:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 10:54:42,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:54:42,414 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:54:42,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-12-17 10:54:42,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:42,627 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:54:42,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:54:42,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1904301857, now seen corresponding path program 39 times [2021-12-17 10:54:42,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:54:42,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857988074] [2021-12-17 10:54:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:54:42,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:54:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:43,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:43,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857988074] [2021-12-17 10:54:43,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857988074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:43,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048774768] [2021-12-17 10:54:43,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:54:43,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:43,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:43,548 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:43,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-17 10:54:43,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-17 10:54:43,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:54:43,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-17 10:54:43,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:45,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:46,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048774768] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:46,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:46,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 121 [2021-12-17 10:54:46,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869223975] [2021-12-17 10:54:46,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:46,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-12-17 10:54:46,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:46,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-12-17 10:54:46,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2579, Invalid=11941, Unknown=0, NotChecked=0, Total=14520 [2021-12-17 10:54:46,730 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 121 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:54:49,136 INFO L93 Difference]: Finished difference Result 263 states and 268 transitions. [2021-12-17 10:54:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 10:54:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 121 states have internal predecessors, (239), 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 99 [2021-12-17 10:54:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:54:49,137 INFO L225 Difference]: With dead ends: 263 [2021-12-17 10:54:49,137 INFO L226 Difference]: Without dead ends: 208 [2021-12-17 10:54:49,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9030 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4344, Invalid=18006, Unknown=0, NotChecked=0, Total=22350 [2021-12-17 10:54:49,138 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 278 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:54:49,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 168 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:54:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-17 10:54:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 150. [2021-12-17 10:54:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-12-17 10:54:49,170 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 99 [2021-12-17 10:54:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:54:49,170 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-12-17 10:54:49,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 121 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-12-17 10:54:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 10:54:49,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:54:49,170 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:54:49,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-12-17 10:54:49,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-12-17 10:54:49,371 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:54:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:54:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash -854172451, now seen corresponding path program 39 times [2021-12-17 10:54:49,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:54:49,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466795882] [2021-12-17 10:54:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:54:49,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:54:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:50,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:50,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466795882] [2021-12-17 10:54:50,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466795882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:50,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053623434] [2021-12-17 10:54:50,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:54:50,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:50,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:50,508 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:50,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-17 10:54:50,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-17 10:54:50,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:54:50,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-17 10:54:50,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:52,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:53,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053623434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:53,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:53,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 120 [2021-12-17 10:54:53,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911150918] [2021-12-17 10:54:53,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:53,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-12-17 10:54:53,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-12-17 10:54:53,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2591, Invalid=11689, Unknown=0, NotChecked=0, Total=14280 [2021-12-17 10:54:53,446 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:54:54,701 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2021-12-17 10:54:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-17 10:54:54,701 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 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 99 [2021-12-17 10:54:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:54:54,702 INFO L225 Difference]: With dead ends: 173 [2021-12-17 10:54:54,702 INFO L226 Difference]: Without dead ends: 167 [2021-12-17 10:54:54,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9220 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=16106, Unknown=0, NotChecked=0, Total=21462 [2021-12-17 10:54:54,706 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 304 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:54:54,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 101 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:54:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-17 10:54:54,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 152. [2021-12-17 10:54:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-12-17 10:54:54,735 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 99 [2021-12-17 10:54:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:54:54,735 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-12-17 10:54:54,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:54:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-12-17 10:54:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 10:54:54,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:54:54,737 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:54:54,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-12-17 10:54:54,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:54,939 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:54:54,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:54:54,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1528092991, now seen corresponding path program 40 times [2021-12-17 10:54:54,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:54:54,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592102317] [2021-12-17 10:54:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:54:54,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:54:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:54:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 443 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:55,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:54:55,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592102317] [2021-12-17 10:54:55,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592102317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:54:55,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902358326] [2021-12-17 10:54:55,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:54:55,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:54:55,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:54:55,866 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:54:55,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-17 10:54:55,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:54:55,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:54:55,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-17 10:54:55,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:54:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:57,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:54:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:54:58,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902358326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:54:58,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:54:58,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 119 [2021-12-17 10:54:58,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718510245] [2021-12-17 10:54:58,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:54:58,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-17 10:54:58,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:54:58,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-17 10:54:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2589, Invalid=11453, Unknown=0, NotChecked=0, Total=14042 [2021-12-17 10:54:58,937 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:55:00,613 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2021-12-17 10:55:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 10:55:00,614 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 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 101 [2021-12-17 10:55:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:55:00,615 INFO L225 Difference]: With dead ends: 207 [2021-12-17 10:55:00,615 INFO L226 Difference]: Without dead ends: 152 [2021-12-17 10:55:00,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8508 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4199, Invalid=16681, Unknown=0, NotChecked=0, Total=20880 [2021-12-17 10:55:00,616 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 128 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:55:00,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 103 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:55:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-17 10:55:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-12-17 10:55:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2021-12-17 10:55:00,649 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 101 [2021-12-17 10:55:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:55:00,650 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2021-12-17 10:55:00,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2021-12-17 10:55:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 10:55:00,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:55:00,651 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:55:00,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-12-17 10:55:00,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:00,859 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:55:00,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:55:00,860 INFO L85 PathProgramCache]: Analyzing trace with hash -152492385, now seen corresponding path program 40 times [2021-12-17 10:55:00,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:55:00,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127123446] [2021-12-17 10:55:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:55:00,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:55:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 400 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:01,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:55:01,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127123446] [2021-12-17 10:55:01,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127123446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:55:01,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895614016] [2021-12-17 10:55:01,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:55:01,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:01,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:55:01,995 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:55:01,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-17 10:55:02,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:55:02,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:55:02,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-17 10:55:02,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:55:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:03,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:55:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:04,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895614016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:55:04,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:55:04,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 119 [2021-12-17 10:55:04,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025498553] [2021-12-17 10:55:04,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:55:04,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-17 10:55:04,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:55:04,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-17 10:55:04,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2610, Invalid=11432, Unknown=0, NotChecked=0, Total=14042 [2021-12-17 10:55:04,833 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:55:06,046 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2021-12-17 10:55:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-17 10:55:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 states have internal predecessors, (241), 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 101 [2021-12-17 10:55:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:55:06,047 INFO L225 Difference]: With dead ends: 161 [2021-12-17 10:55:06,047 INFO L226 Difference]: Without dead ends: 155 [2021-12-17 10:55:06,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8932 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5242, Invalid=15350, Unknown=0, NotChecked=0, Total=20592 [2021-12-17 10:55:06,048 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 325 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:55:06,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 63 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:55:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-17 10:55:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2021-12-17 10:55:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 152 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2021-12-17 10:55:06,085 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 101 [2021-12-17 10:55:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:55:06,085 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2021-12-17 10:55:06,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:06,085 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2021-12-17 10:55:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 10:55:06,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:55:06,086 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:55:06,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-12-17 10:55:06,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-12-17 10:55:06,295 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:55:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:55:06,296 INFO L85 PathProgramCache]: Analyzing trace with hash -240389375, now seen corresponding path program 41 times [2021-12-17 10:55:06,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:55:06,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416251033] [2021-12-17 10:55:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:55:06,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:55:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:07,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:55:07,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416251033] [2021-12-17 10:55:07,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416251033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:55:07,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993363915] [2021-12-17 10:55:07,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:55:07,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:07,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:55:07,266 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:55:07,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-17 10:55:07,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-17 10:55:07,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:55:07,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-17 10:55:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:55:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:09,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:55:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:10,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993363915] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:55:10,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:55:10,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 126 [2021-12-17 10:55:10,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108279045] [2021-12-17 10:55:10,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:55:10,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-12-17 10:55:10,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:55:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-12-17 10:55:10,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2798, Invalid=12952, Unknown=0, NotChecked=0, Total=15750 [2021-12-17 10:55:10,644 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:55:13,639 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2021-12-17 10:55:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-17 10:55:13,640 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 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 103 [2021-12-17 10:55:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:55:13,640 INFO L225 Difference]: With dead ends: 273 [2021-12-17 10:55:13,641 INFO L226 Difference]: Without dead ends: 216 [2021-12-17 10:55:13,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9796 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4697, Invalid=19483, Unknown=0, NotChecked=0, Total=24180 [2021-12-17 10:55:13,642 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 332 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:55:13,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 127 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:55:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-17 10:55:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2021-12-17 10:55:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2021-12-17 10:55:13,673 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 103 [2021-12-17 10:55:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:55:13,673 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2021-12-17 10:55:13,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2021-12-17 10:55:13,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 10:55:13,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:55:13,673 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:55:13,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-12-17 10:55:13,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:13,878 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:55:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:55:13,879 INFO L85 PathProgramCache]: Analyzing trace with hash 633782589, now seen corresponding path program 41 times [2021-12-17 10:55:13,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:55:13,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708542130] [2021-12-17 10:55:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:55:13,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:55:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:15,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:55:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708542130] [2021-12-17 10:55:15,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708542130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:55:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252367926] [2021-12-17 10:55:15,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:55:15,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:15,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:55:15,083 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:55:15,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-17 10:55:15,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-17 10:55:15,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:55:15,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-17 10:55:15,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:55:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:16,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:55:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:18,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252367926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:55:18,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:55:18,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 125 [2021-12-17 10:55:18,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774868114] [2021-12-17 10:55:18,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:55:18,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-12-17 10:55:18,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:55:18,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-12-17 10:55:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2811, Invalid=12689, Unknown=0, NotChecked=0, Total=15500 [2021-12-17 10:55:18,145 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:55:19,440 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2021-12-17 10:55:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-17 10:55:19,440 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 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 103 [2021-12-17 10:55:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:55:19,440 INFO L225 Difference]: With dead ends: 179 [2021-12-17 10:55:19,440 INFO L226 Difference]: Without dead ends: 173 [2021-12-17 10:55:19,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10018 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5803, Invalid=17453, Unknown=0, NotChecked=0, Total=23256 [2021-12-17 10:55:19,441 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 542 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:55:19,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 78 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:55:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-17 10:55:19,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 158. [2021-12-17 10:55:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2021-12-17 10:55:19,472 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 103 [2021-12-17 10:55:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:55:19,472 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2021-12-17 10:55:19,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2021-12-17 10:55:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 10:55:19,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:55:19,473 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:55:19,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-12-17 10:55:19,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:19,675 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:55:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:55:19,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1228776863, now seen corresponding path program 42 times [2021-12-17 10:55:19,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:55:19,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418768291] [2021-12-17 10:55:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:55:19,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:55:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 486 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:20,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:55:20,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418768291] [2021-12-17 10:55:20,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418768291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:55:20,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716842703] [2021-12-17 10:55:20,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:55:20,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:20,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:55:20,624 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:55:20,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-17 10:55:20,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-12-17 10:55:20,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:55:20,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 10:55:20,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:55:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:22,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:55:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:23,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716842703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:55:23,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:55:23,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 124 [2021-12-17 10:55:23,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566181122] [2021-12-17 10:55:23,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:55:23,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-12-17 10:55:23,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:55:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-12-17 10:55:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2809, Invalid=12443, Unknown=0, NotChecked=0, Total=15252 [2021-12-17 10:55:23,884 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:55:25,653 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2021-12-17 10:55:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 10:55:25,654 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 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 105 [2021-12-17 10:55:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:55:25,654 INFO L225 Difference]: With dead ends: 215 [2021-12-17 10:55:25,654 INFO L226 Difference]: Without dead ends: 158 [2021-12-17 10:55:25,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9251 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4548, Invalid=18102, Unknown=0, NotChecked=0, Total=22650 [2021-12-17 10:55:25,655 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:55:25,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 109 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:55:25,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-17 10:55:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-12-17 10:55:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2021-12-17 10:55:25,690 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 105 [2021-12-17 10:55:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:55:25,691 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2021-12-17 10:55:25,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2021-12-17 10:55:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 10:55:25,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:55:25,691 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:55:25,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-12-17 10:55:25,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-12-17 10:55:25,907 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:55:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:55:25,907 INFO L85 PathProgramCache]: Analyzing trace with hash -679226497, now seen corresponding path program 42 times [2021-12-17 10:55:25,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:55:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968043425] [2021-12-17 10:55:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:55:25,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:55:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 441 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:27,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:55:27,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968043425] [2021-12-17 10:55:27,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968043425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:55:27,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26313223] [2021-12-17 10:55:27,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:55:27,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:27,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:55:27,122 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:55:27,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-17 10:55:27,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-12-17 10:55:27,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:55:27,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 10:55:27,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:55:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:28,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:55:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:30,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26313223] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:55:30,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:55:30,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 124 [2021-12-17 10:55:30,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075201798] [2021-12-17 10:55:30,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:55:30,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-12-17 10:55:30,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:55:30,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-12-17 10:55:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2831, Invalid=12421, Unknown=0, NotChecked=0, Total=15252 [2021-12-17 10:55:30,133 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 124 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:55:31,286 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-12-17 10:55:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-17 10:55:31,286 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 124 states have internal predecessors, (251), 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 105 [2021-12-17 10:55:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:55:31,287 INFO L225 Difference]: With dead ends: 167 [2021-12-17 10:55:31,287 INFO L226 Difference]: Without dead ends: 161 [2021-12-17 10:55:31,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9717 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5685, Invalid=16665, Unknown=0, NotChecked=0, Total=22350 [2021-12-17 10:55:31,288 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 340 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:55:31,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 46 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:55:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-17 10:55:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-12-17 10:55:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2021-12-17 10:55:31,322 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 105 [2021-12-17 10:55:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:55:31,323 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2021-12-17 10:55:31,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 124 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2021-12-17 10:55:31,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 10:55:31,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:55:31,323 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:55:31,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-12-17 10:55:31,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:31,535 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:55:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:55:31,535 INFO L85 PathProgramCache]: Analyzing trace with hash 374269921, now seen corresponding path program 43 times [2021-12-17 10:55:31,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:55:31,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130136531] [2021-12-17 10:55:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:55:31,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:55:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 484 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:32,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:55:32,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130136531] [2021-12-17 10:55:32,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130136531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:55:32,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432352891] [2021-12-17 10:55:32,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:55:32,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:32,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:55:32,547 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:55:32,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-17 10:55:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:32,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-17 10:55:32,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:55:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:34,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:55:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:36,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432352891] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:55:36,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:55:36,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 131 [2021-12-17 10:55:36,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572311640] [2021-12-17 10:55:36,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:55:36,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-17 10:55:36,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:55:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-17 10:55:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=14004, Unknown=0, NotChecked=0, Total=17030 [2021-12-17 10:55:36,190 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 131 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:55:39,059 INFO L93 Difference]: Finished difference Result 283 states and 288 transitions. [2021-12-17 10:55:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 10:55:39,059 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 131 states have internal predecessors, (259), 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 107 [2021-12-17 10:55:39,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:55:39,060 INFO L225 Difference]: With dead ends: 283 [2021-12-17 10:55:39,060 INFO L226 Difference]: Without dead ends: 224 [2021-12-17 10:55:39,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10593 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5064, Invalid=21018, Unknown=0, NotChecked=0, Total=26082 [2021-12-17 10:55:39,061 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 465 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:55:39,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 145 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:55:39,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-17 10:55:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 162. [2021-12-17 10:55:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.031055900621118) internal successors, (166), 161 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2021-12-17 10:55:39,098 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 107 [2021-12-17 10:55:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:55:39,098 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2021-12-17 10:55:39,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 131 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2021-12-17 10:55:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 10:55:39,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:55:39,099 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:55:39,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-12-17 10:55:39,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:39,310 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:55:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:55:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash 413097629, now seen corresponding path program 43 times [2021-12-17 10:55:39,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:55:39,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094340665] [2021-12-17 10:55:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:55:39,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:55:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 484 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:40,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:55:40,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094340665] [2021-12-17 10:55:40,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094340665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:55:40,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436229184] [2021-12-17 10:55:40,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:55:40,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:40,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:55:40,606 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:55:40,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-17 10:55:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:40,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-17 10:55:40,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:55:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:42,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:55:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:43,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436229184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:55:43,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:55:43,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 130 [2021-12-17 10:55:43,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221672366] [2021-12-17 10:55:43,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:55:43,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-12-17 10:55:43,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:55:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-12-17 10:55:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3040, Invalid=13730, Unknown=0, NotChecked=0, Total=16770 [2021-12-17 10:55:43,994 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:55:45,372 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2021-12-17 10:55:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 10:55:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 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 107 [2021-12-17 10:55:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:55:45,373 INFO L225 Difference]: With dead ends: 185 [2021-12-17 10:55:45,373 INFO L226 Difference]: Without dead ends: 179 [2021-12-17 10:55:45,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10849 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6268, Invalid=18854, Unknown=0, NotChecked=0, Total=25122 [2021-12-17 10:55:45,374 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 207 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:55:45,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 89 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:55:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-17 10:55:45,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2021-12-17 10:55:45,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2021-12-17 10:55:45,407 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 107 [2021-12-17 10:55:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:55:45,407 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2021-12-17 10:55:45,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2021-12-17 10:55:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 10:55:45,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:55:45,408 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:55:45,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-12-17 10:55:45,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:45,608 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:55:45,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:55:45,609 INFO L85 PathProgramCache]: Analyzing trace with hash -396072193, now seen corresponding path program 44 times [2021-12-17 10:55:45,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:55:45,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654003069] [2021-12-17 10:55:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:55:45,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:55:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 531 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:46,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:55:46,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654003069] [2021-12-17 10:55:46,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654003069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:55:46,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227403998] [2021-12-17 10:55:46,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:55:46,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:46,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:55:46,614 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:55:46,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-17 10:55:46,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:55:46,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:55:46,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-17 10:55:46,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:55:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:48,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:55:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:50,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227403998] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:55:50,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:55:50,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 129 [2021-12-17 10:55:50,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567132939] [2021-12-17 10:55:50,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:55:50,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-17 10:55:50,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:55:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-17 10:55:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3038, Invalid=13474, Unknown=0, NotChecked=0, Total=16512 [2021-12-17 10:55:50,100 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:55:52,108 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2021-12-17 10:55:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 10:55:52,108 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 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 109 [2021-12-17 10:55:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:55:52,119 INFO L225 Difference]: With dead ends: 223 [2021-12-17 10:55:52,120 INFO L226 Difference]: Without dead ends: 164 [2021-12-17 10:55:52,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10025 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4911, Invalid=19581, Unknown=0, NotChecked=0, Total=24492 [2021-12-17 10:55:52,121 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 102 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:55:52,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 148 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:55:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-17 10:55:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-12-17 10:55:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2021-12-17 10:55:52,155 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 109 [2021-12-17 10:55:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:55:52,155 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2021-12-17 10:55:52,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2021-12-17 10:55:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 10:55:52,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:55:52,156 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:55:52,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-12-17 10:55:52,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-12-17 10:55:52,356 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:55:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:55:52,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1809426081, now seen corresponding path program 44 times [2021-12-17 10:55:52,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:55:52,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338131793] [2021-12-17 10:55:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:55:52,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:55:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 484 proven. 621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:53,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:55:53,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338131793] [2021-12-17 10:55:53,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338131793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:55:53,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115521900] [2021-12-17 10:55:53,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:55:53,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:53,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:55:53,634 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:55:53,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-12-17 10:55:53,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:55:53,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:55:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-17 10:55:53,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:55:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:55,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:55:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:56,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115521900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:55:56,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:55:56,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 129 [2021-12-17 10:55:56,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876082355] [2021-12-17 10:55:56,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:55:56,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-17 10:55:56,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:55:56,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-17 10:55:56,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3061, Invalid=13451, Unknown=0, NotChecked=0, Total=16512 [2021-12-17 10:55:56,849 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 129 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:55:58,104 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2021-12-17 10:55:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-17 10:55:58,105 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 129 states have internal predecessors, (261), 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 109 [2021-12-17 10:55:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:55:58,105 INFO L225 Difference]: With dead ends: 173 [2021-12-17 10:55:58,105 INFO L226 Difference]: Without dead ends: 167 [2021-12-17 10:55:58,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10535 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6146, Invalid=18034, Unknown=0, NotChecked=0, Total=24180 [2021-12-17 10:55:58,106 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 193 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:55:58,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 69 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:55:58,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-17 10:55:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-12-17 10:55:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2021-12-17 10:55:58,145 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 109 [2021-12-17 10:55:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:55:58,145 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2021-12-17 10:55:58,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 129 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:55:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2021-12-17 10:55:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 10:55:58,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:55:58,145 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:55:58,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-12-17 10:55:58,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:58,347 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:55:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:55:58,347 INFO L85 PathProgramCache]: Analyzing trace with hash 879195585, now seen corresponding path program 45 times [2021-12-17 10:55:58,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:55:58,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782670248] [2021-12-17 10:55:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:55:58,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:55:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:55:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 529 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:55:59,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:55:59,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782670248] [2021-12-17 10:55:59,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782670248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:55:59,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423491611] [2021-12-17 10:55:59,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:55:59,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:55:59,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:55:59,434 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:55:59,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-12-17 10:55:59,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-12-17 10:55:59,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:55:59,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-17 10:55:59,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:56:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:01,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:56:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:03,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423491611] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:56:03,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:56:03,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 136 [2021-12-17 10:56:03,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569587033] [2021-12-17 10:56:03,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:56:03,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-12-17 10:56:03,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:56:03,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-12-17 10:56:03,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3263, Invalid=15097, Unknown=0, NotChecked=0, Total=18360 [2021-12-17 10:56:03,312 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:56:06,336 INFO L93 Difference]: Finished difference Result 293 states and 298 transitions. [2021-12-17 10:56:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-17 10:56:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 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 111 [2021-12-17 10:56:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:56:06,337 INFO L225 Difference]: With dead ends: 293 [2021-12-17 10:56:06,337 INFO L226 Difference]: Without dead ends: 232 [2021-12-17 10:56:06,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11421 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5445, Invalid=22611, Unknown=0, NotChecked=0, Total=28056 [2021-12-17 10:56:06,339 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 247 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:56:06,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 127 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:56:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-17 10:56:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2021-12-17 10:56:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.029940119760479) internal successors, (172), 167 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2021-12-17 10:56:06,374 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 111 [2021-12-17 10:56:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:56:06,374 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2021-12-17 10:56:06,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2021-12-17 10:56:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 10:56:06,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:56:06,375 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:56:06,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-12-17 10:56:06,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:06,576 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:56:06,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:56:06,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1311077629, now seen corresponding path program 45 times [2021-12-17 10:56:06,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:56:06,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611307798] [2021-12-17 10:56:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:56:06,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:56:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:56:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 529 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:07,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:56:07,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611307798] [2021-12-17 10:56:07,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611307798] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:56:07,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083413183] [2021-12-17 10:56:07,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:56:07,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:07,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:56:07,960 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:56:07,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-12-17 10:56:08,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-12-17 10:56:08,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:56:08,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-17 10:56:08,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:56:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:10,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:56:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:11,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083413183] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:56:11,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:56:11,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 135 [2021-12-17 10:56:11,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641725721] [2021-12-17 10:56:11,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:56:11,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-12-17 10:56:11,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:56:11,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-12-17 10:56:11,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3278, Invalid=14812, Unknown=0, NotChecked=0, Total=18090 [2021-12-17 10:56:11,566 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:13,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:56:13,100 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2021-12-17 10:56:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-17 10:56:13,100 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 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 111 [2021-12-17 10:56:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:56:13,101 INFO L225 Difference]: With dead ends: 191 [2021-12-17 10:56:13,101 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 10:56:13,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11713 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6751, Invalid=20309, Unknown=0, NotChecked=0, Total=27060 [2021-12-17 10:56:13,102 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 365 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:56:13,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 119 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:56:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 10:56:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 170. [2021-12-17 10:56:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-12-17 10:56:13,142 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 111 [2021-12-17 10:56:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:56:13,142 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-12-17 10:56:13,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-12-17 10:56:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 10:56:13,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:56:13,143 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:56:13,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-12-17 10:56:13,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:13,344 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:56:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:56:13,344 INFO L85 PathProgramCache]: Analyzing trace with hash -725718689, now seen corresponding path program 46 times [2021-12-17 10:56:13,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:56:13,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209579347] [2021-12-17 10:56:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:56:13,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:56:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:56:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 578 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:14,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:56:14,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209579347] [2021-12-17 10:56:14,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209579347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:56:14,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21045637] [2021-12-17 10:56:14,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:56:14,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:14,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:56:14,434 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:56:14,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-12-17 10:56:14,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:56:14,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:56:14,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-17 10:56:14,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:56:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:16,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:56:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:18,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21045637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:56:18,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:56:18,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 134 [2021-12-17 10:56:18,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069640177] [2021-12-17 10:56:18,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:56:18,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-12-17 10:56:18,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:56:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-12-17 10:56:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3276, Invalid=14546, Unknown=0, NotChecked=0, Total=17822 [2021-12-17 10:56:18,231 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 134 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:56:20,388 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2021-12-17 10:56:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-17 10:56:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 134 states have internal predecessors, (269), 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 113 [2021-12-17 10:56:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:56:20,391 INFO L225 Difference]: With dead ends: 231 [2021-12-17 10:56:20,391 INFO L226 Difference]: Without dead ends: 170 [2021-12-17 10:56:20,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10830 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5288, Invalid=21118, Unknown=0, NotChecked=0, Total=26406 [2021-12-17 10:56:20,393 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 183 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:56:20,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 119 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:56:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-17 10:56:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-12-17 10:56:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 168 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2021-12-17 10:56:20,439 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 113 [2021-12-17 10:56:20,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:56:20,439 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2021-12-17 10:56:20,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 134 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2021-12-17 10:56:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 10:56:20,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:56:20,440 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:56:20,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-12-17 10:56:20,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:20,640 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:56:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:56:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash 772667455, now seen corresponding path program 46 times [2021-12-17 10:56:20,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:56:20,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375922948] [2021-12-17 10:56:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:56:20,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:56:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:56:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 529 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:22,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:56:22,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375922948] [2021-12-17 10:56:22,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375922948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:56:22,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602216332] [2021-12-17 10:56:22,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:56:22,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:22,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:56:22,074 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:56:22,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-12-17 10:56:22,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:56:22,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:56:22,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-17 10:56:22,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:56:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:24,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:56:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:25,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602216332] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:56:25,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:56:25,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 134 [2021-12-17 10:56:25,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14243183] [2021-12-17 10:56:25,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:56:25,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-12-17 10:56:25,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:56:25,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-12-17 10:56:25,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3300, Invalid=14522, Unknown=0, NotChecked=0, Total=17822 [2021-12-17 10:56:25,617 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:56:26,991 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2021-12-17 10:56:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 10:56:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 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 113 [2021-12-17 10:56:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:56:26,992 INFO L225 Difference]: With dead ends: 179 [2021-12-17 10:56:26,992 INFO L226 Difference]: Without dead ends: 173 [2021-12-17 10:56:26,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11386 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6625, Invalid=19457, Unknown=0, NotChecked=0, Total=26082 [2021-12-17 10:56:26,993 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 517 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:56:26,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 48 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:56:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-17 10:56:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-12-17 10:56:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2021-12-17 10:56:27,030 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 113 [2021-12-17 10:56:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:56:27,030 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2021-12-17 10:56:27,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2021-12-17 10:56:27,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 10:56:27,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:56:27,030 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:56:27,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-12-17 10:56:27,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-12-17 10:56:27,231 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:56:27,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:56:27,231 INFO L85 PathProgramCache]: Analyzing trace with hash -220013407, now seen corresponding path program 47 times [2021-12-17 10:56:27,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:56:27,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933040563] [2021-12-17 10:56:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:56:27,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:56:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:56:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 576 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:28,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:56:28,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933040563] [2021-12-17 10:56:28,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933040563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:56:28,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968529452] [2021-12-17 10:56:28,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:56:28,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:28,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:56:28,405 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:56:28,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-12-17 10:56:28,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-17 10:56:28,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:56:28,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-17 10:56:28,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:56:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:30,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:56:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:32,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968529452] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:56:32,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:56:32,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 141 [2021-12-17 10:56:32,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966661005] [2021-12-17 10:56:32,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:56:32,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-12-17 10:56:32,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:56:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-12-17 10:56:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3509, Invalid=16231, Unknown=0, NotChecked=0, Total=19740 [2021-12-17 10:56:32,598 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 141 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:56:35,794 INFO L93 Difference]: Finished difference Result 303 states and 308 transitions. [2021-12-17 10:56:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-17 10:56:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 141 states have internal predecessors, (279), 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 115 [2021-12-17 10:56:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:56:35,795 INFO L225 Difference]: With dead ends: 303 [2021-12-17 10:56:35,795 INFO L226 Difference]: Without dead ends: 240 [2021-12-17 10:56:35,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 143 SyntacticMatches, 4 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12280 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=5840, Invalid=24262, Unknown=0, NotChecked=0, Total=30102 [2021-12-17 10:56:35,797 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 288 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:56:35,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 121 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:56:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-17 10:56:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 174. [2021-12-17 10:56:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2021-12-17 10:56:35,837 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 115 [2021-12-17 10:56:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:56:35,837 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2021-12-17 10:56:35,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 141 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2021-12-17 10:56:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 10:56:35,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:56:35,838 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:56:35,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-12-17 10:56:36,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-12-17 10:56:36,038 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:56:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:56:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash -20036515, now seen corresponding path program 47 times [2021-12-17 10:56:36,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:56:36,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822108801] [2021-12-17 10:56:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:56:36,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:56:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:56:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 576 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:37,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:56:37,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822108801] [2021-12-17 10:56:37,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822108801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:56:37,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545911849] [2021-12-17 10:56:37,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:56:37,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:37,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:56:37,554 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:56:37,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-12-17 10:56:37,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-17 10:56:37,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:56:37,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-17 10:56:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:56:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:39,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:56:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:41,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545911849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:56:41,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:56:41,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 140 [2021-12-17 10:56:41,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392212030] [2021-12-17 10:56:41,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:56:41,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2021-12-17 10:56:41,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:56:41,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-12-17 10:56:41,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3525, Invalid=15935, Unknown=0, NotChecked=0, Total=19460 [2021-12-17 10:56:41,352 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 140 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:56:42,994 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2021-12-17 10:56:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-17 10:56:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 140 states have internal predecessors, (279), 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 115 [2021-12-17 10:56:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:56:42,994 INFO L225 Difference]: With dead ends: 197 [2021-12-17 10:56:42,994 INFO L226 Difference]: Without dead ends: 191 [2021-12-17 10:56:42,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12610 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7252, Invalid=21818, Unknown=0, NotChecked=0, Total=29070 [2021-12-17 10:56:42,996 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 331 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:56:42,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 106 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:56:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-17 10:56:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 176. [2021-12-17 10:56:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 175 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:43,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2021-12-17 10:56:43,038 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 115 [2021-12-17 10:56:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:56:43,038 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2021-12-17 10:56:43,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 140 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2021-12-17 10:56:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 10:56:43,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:56:43,039 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:56:43,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-12-17 10:56:43,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-12-17 10:56:43,239 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:56:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:56:43,240 INFO L85 PathProgramCache]: Analyzing trace with hash -26156865, now seen corresponding path program 48 times [2021-12-17 10:56:43,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:56:43,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644777131] [2021-12-17 10:56:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:56:43,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:56:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:56:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 627 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:44,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:56:44,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644777131] [2021-12-17 10:56:44,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644777131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:56:44,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292732676] [2021-12-17 10:56:44,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:56:44,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:44,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:56:44,386 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:56:44,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-12-17 10:56:44,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-12-17 10:56:44,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:56:44,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-17 10:56:44,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:56:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:46,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:56:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:48,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292732676] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:56:48,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:56:48,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 139 [2021-12-17 10:56:48,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385758408] [2021-12-17 10:56:48,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:56:48,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-12-17 10:56:48,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:56:48,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-12-17 10:56:48,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3523, Invalid=15659, Unknown=0, NotChecked=0, Total=19182 [2021-12-17 10:56:48,441 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 139 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:50,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:56:50,854 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2021-12-17 10:56:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 10:56:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 139 states have internal predecessors, (279), 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 117 [2021-12-17 10:56:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:56:50,855 INFO L225 Difference]: With dead ends: 239 [2021-12-17 10:56:50,855 INFO L226 Difference]: Without dead ends: 176 [2021-12-17 10:56:50,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11666 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5679, Invalid=22713, Unknown=0, NotChecked=0, Total=28392 [2021-12-17 10:56:50,856 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 227 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:56:50,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 127 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:56:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-17 10:56:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-12-17 10:56:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2021-12-17 10:56:50,896 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 117 [2021-12-17 10:56:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:56:50,896 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2021-12-17 10:56:50,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 139 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2021-12-17 10:56:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 10:56:50,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:56:50,897 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:56:50,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-12-17 10:56:51,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:51,102 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:56:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:56:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash -664276961, now seen corresponding path program 48 times [2021-12-17 10:56:51,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:56:51,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822524053] [2021-12-17 10:56:51,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:56:51,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:56:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:56:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 576 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:52,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:56:52,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822524053] [2021-12-17 10:56:52,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822524053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:56:52,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967336117] [2021-12-17 10:56:52,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:56:52,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:52,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:56:52,605 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:56:52,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-12-17 10:56:52,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-12-17 10:56:52,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:56:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-17 10:56:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:56:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:54,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:56:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:56,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967336117] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:56:56,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:56:56,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 139 [2021-12-17 10:56:56,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841053950] [2021-12-17 10:56:56,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:56:56,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-12-17 10:56:56,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:56:56,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-12-17 10:56:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3548, Invalid=15634, Unknown=0, NotChecked=0, Total=19182 [2021-12-17 10:56:56,356 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:56:57,876 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2021-12-17 10:56:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-17 10:56:57,877 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 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 117 [2021-12-17 10:56:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:56:57,877 INFO L225 Difference]: With dead ends: 185 [2021-12-17 10:56:57,877 INFO L226 Difference]: Without dead ends: 179 [2021-12-17 10:56:57,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12270 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7122, Invalid=20934, Unknown=0, NotChecked=0, Total=28056 [2021-12-17 10:56:57,878 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 197 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:56:57,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 80 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:56:57,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-17 10:56:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2021-12-17 10:56:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2021-12-17 10:56:57,924 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 117 [2021-12-17 10:56:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:56:57,924 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2021-12-17 10:56:57,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:56:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2021-12-17 10:56:57,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 10:56:57,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:56:57,925 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:56:57,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-12-17 10:56:58,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-12-17 10:56:58,126 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:56:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:56:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1855872129, now seen corresponding path program 49 times [2021-12-17 10:56:58,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:56:58,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474732852] [2021-12-17 10:56:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:56:58,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:56:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:56:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 625 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:56:59,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:56:59,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474732852] [2021-12-17 10:56:59,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474732852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:56:59,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698913916] [2021-12-17 10:56:59,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:56:59,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:56:59,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:56:59,362 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:56:59,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-12-17 10:56:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:56:59,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-17 10:56:59,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:57:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:01,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:57:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:03,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698913916] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:57:03,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:57:03,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 146 [2021-12-17 10:57:03,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327623483] [2021-12-17 10:57:03,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:57:03,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-12-17 10:57:03,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:57:03,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-12-17 10:57:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3764, Invalid=17406, Unknown=0, NotChecked=0, Total=21170 [2021-12-17 10:57:03,822 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:57:07,234 INFO L93 Difference]: Finished difference Result 313 states and 318 transitions. [2021-12-17 10:57:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-17 10:57:07,235 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 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 119 [2021-12-17 10:57:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:57:07,235 INFO L225 Difference]: With dead ends: 313 [2021-12-17 10:57:07,235 INFO L226 Difference]: Without dead ends: 248 [2021-12-17 10:57:07,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13170 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=6249, Invalid=25971, Unknown=0, NotChecked=0, Total=32220 [2021-12-17 10:57:07,237 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 353 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:57:07,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 149 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:57:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-17 10:57:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 180. [2021-12-17 10:57:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2021-12-17 10:57:07,293 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 119 [2021-12-17 10:57:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:57:07,293 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2021-12-17 10:57:07,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2021-12-17 10:57:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 10:57:07,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:57:07,293 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:57:07,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-12-17 10:57:07,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-12-17 10:57:07,494 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:57:07,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:57:07,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1761669955, now seen corresponding path program 49 times [2021-12-17 10:57:07,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:57:07,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417492824] [2021-12-17 10:57:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:57:07,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:57:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:57:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 625 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:09,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:57:09,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417492824] [2021-12-17 10:57:09,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417492824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:57:09,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492894200] [2021-12-17 10:57:09,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:57:09,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:09,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:57:09,080 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:57:09,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-12-17 10:57:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:57:09,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-17 10:57:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:57:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:11,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:57:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:13,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492894200] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:57:13,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:57:13,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 145 [2021-12-17 10:57:13,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892252494] [2021-12-17 10:57:13,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:57:13,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-12-17 10:57:13,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:57:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-12-17 10:57:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=17099, Unknown=0, NotChecked=0, Total=20880 [2021-12-17 10:57:13,141 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 145 states, 145 states have (on average 1.993103448275862) internal successors, (289), 145 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:57:14,998 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2021-12-17 10:57:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-17 10:57:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.993103448275862) internal successors, (289), 145 states have internal predecessors, (289), 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 119 [2021-12-17 10:57:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:57:14,998 INFO L225 Difference]: With dead ends: 203 [2021-12-17 10:57:14,998 INFO L226 Difference]: Without dead ends: 197 [2021-12-17 10:57:14,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13540 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7771, Invalid=23381, Unknown=0, NotChecked=0, Total=31152 [2021-12-17 10:57:14,999 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 318 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 10:57:15,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 158 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 10:57:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-17 10:57:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2021-12-17 10:57:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 181 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2021-12-17 10:57:15,041 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 119 [2021-12-17 10:57:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:57:15,041 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2021-12-17 10:57:15,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.993103448275862) internal successors, (289), 145 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:15,041 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2021-12-17 10:57:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 10:57:15,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:57:15,042 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:57:15,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-12-17 10:57:15,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:15,251 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:57:15,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:57:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1301352735, now seen corresponding path program 50 times [2021-12-17 10:57:15,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:57:15,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439903836] [2021-12-17 10:57:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:57:15,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:57:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:57:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 678 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:16,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:57:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439903836] [2021-12-17 10:57:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439903836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:57:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302363963] [2021-12-17 10:57:16,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:57:16,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:57:16,480 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:57:16,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-12-17 10:57:16,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:57:16,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:57:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 10:57:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:57:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:18,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:57:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:20,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302363963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:57:20,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:57:20,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 144 [2021-12-17 10:57:20,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717318371] [2021-12-17 10:57:20,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:57:20,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-12-17 10:57:20,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:57:20,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-12-17 10:57:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3779, Invalid=16813, Unknown=0, NotChecked=0, Total=20592 [2021-12-17 10:57:20,842 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 144 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:57:23,384 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2021-12-17 10:57:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-17 10:57:23,385 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 144 states have internal predecessors, (289), 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 121 [2021-12-17 10:57:23,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:57:23,385 INFO L225 Difference]: With dead ends: 247 [2021-12-17 10:57:23,386 INFO L226 Difference]: Without dead ends: 182 [2021-12-17 10:57:23,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12533 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6084, Invalid=24366, Unknown=0, NotChecked=0, Total=30450 [2021-12-17 10:57:23,387 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 202 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:57:23,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 110 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:57:23,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-17 10:57:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-12-17 10:57:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2021-12-17 10:57:23,435 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 121 [2021-12-17 10:57:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:57:23,435 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2021-12-17 10:57:23,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 144 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2021-12-17 10:57:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 10:57:23,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:57:23,436 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:57:23,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-12-17 10:57:23,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:23,636 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:57:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:57:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash 475103487, now seen corresponding path program 50 times [2021-12-17 10:57:23,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:57:23,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068729805] [2021-12-17 10:57:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:57:23,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:57:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:57:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 625 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:25,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:57:25,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068729805] [2021-12-17 10:57:25,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068729805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:57:25,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035860208] [2021-12-17 10:57:25,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:57:25,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:25,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:57:25,242 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:57:25,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-12-17 10:57:25,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:57:25,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:57:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 10:57:25,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:57:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:27,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:57:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:29,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035860208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:57:29,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:57:29,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 144 [2021-12-17 10:57:29,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680446883] [2021-12-17 10:57:29,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:57:29,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-12-17 10:57:29,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:57:29,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-12-17 10:57:29,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3805, Invalid=16787, Unknown=0, NotChecked=0, Total=20592 [2021-12-17 10:57:29,243 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:57:30,787 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2021-12-17 10:57:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-17 10:57:30,787 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 144 states have internal predecessors, (291), 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 121 [2021-12-17 10:57:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:57:30,788 INFO L225 Difference]: With dead ends: 191 [2021-12-17 10:57:30,788 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 10:57:30,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 154 SyntacticMatches, 4 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13187 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7637, Invalid=22465, Unknown=0, NotChecked=0, Total=30102 [2021-12-17 10:57:30,789 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 381 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:57:30,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 59 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:57:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 10:57:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-12-17 10:57:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.021978021978022) internal successors, (186), 182 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2021-12-17 10:57:30,838 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 121 [2021-12-17 10:57:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:57:30,838 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2021-12-17 10:57:30,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2021-12-17 10:57:30,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 10:57:30,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:57:30,839 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:57:30,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-12-17 10:57:31,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-12-17 10:57:31,039 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:57:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:57:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1583822177, now seen corresponding path program 51 times [2021-12-17 10:57:31,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:57:31,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590165592] [2021-12-17 10:57:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:57:31,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:57:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:57:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 676 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:32,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:57:32,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590165592] [2021-12-17 10:57:32,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590165592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:57:32,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832969432] [2021-12-17 10:57:32,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:57:32,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:32,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:57:32,316 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:57:32,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-12-17 10:57:32,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-12-17 10:57:32,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:57:32,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-17 10:57:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:57:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:34,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:57:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:37,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832969432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:57:37,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:57:37,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 151 [2021-12-17 10:57:37,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481633421] [2021-12-17 10:57:37,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:57:37,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-12-17 10:57:37,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:57:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-12-17 10:57:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4028, Invalid=18622, Unknown=0, NotChecked=0, Total=22650 [2021-12-17 10:57:37,022 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:57:40,514 INFO L93 Difference]: Finished difference Result 323 states and 328 transitions. [2021-12-17 10:57:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-17 10:57:40,515 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 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 123 [2021-12-17 10:57:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:57:40,515 INFO L225 Difference]: With dead ends: 323 [2021-12-17 10:57:40,515 INFO L226 Difference]: Without dead ends: 256 [2021-12-17 10:57:40,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14091 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=6672, Invalid=27738, Unknown=0, NotChecked=0, Total=34410 [2021-12-17 10:57:40,517 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 248 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:57:40,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 152 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:57:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-17 10:57:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 186. [2021-12-17 10:57:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.027027027027027) internal successors, (190), 185 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-12-17 10:57:40,561 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 123 [2021-12-17 10:57:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:57:40,561 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-12-17 10:57:40,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-12-17 10:57:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 10:57:40,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:57:40,562 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:57:40,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-12-17 10:57:40,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:40,762 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:57:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:57:40,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1527582237, now seen corresponding path program 51 times [2021-12-17 10:57:40,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:57:40,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795856273] [2021-12-17 10:57:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:57:40,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:57:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:57:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 676 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:42,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:57:42,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795856273] [2021-12-17 10:57:42,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795856273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:57:42,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821819741] [2021-12-17 10:57:42,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:57:42,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:42,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:57:42,390 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:57:42,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-12-17 10:57:42,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-12-17 10:57:42,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:57:42,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-17 10:57:42,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:57:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:44,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:57:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:46,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821819741] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:57:46,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:57:46,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 150 [2021-12-17 10:57:46,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475727553] [2021-12-17 10:57:46,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:57:46,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2021-12-17 10:57:46,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:57:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-12-17 10:57:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4046, Invalid=18304, Unknown=0, NotChecked=0, Total=22350 [2021-12-17 10:57:46,464 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 150 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:57:48,219 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2021-12-17 10:57:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-17 10:57:48,219 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 150 states have internal predecessors, (299), 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 123 [2021-12-17 10:57:48,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:57:48,220 INFO L225 Difference]: With dead ends: 209 [2021-12-17 10:57:48,220 INFO L226 Difference]: Without dead ends: 203 [2021-12-17 10:57:48,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14503 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8308, Invalid=24998, Unknown=0, NotChecked=0, Total=33306 [2021-12-17 10:57:48,221 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 484 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:57:48,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 116 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:57:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-17 10:57:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 188. [2021-12-17 10:57:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0267379679144386) internal successors, (192), 187 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2021-12-17 10:57:48,265 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 123 [2021-12-17 10:57:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:57:48,265 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2021-12-17 10:57:48,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 150 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2021-12-17 10:57:48,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 10:57:48,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:57:48,265 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:57:48,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-12-17 10:57:48,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:48,466 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:57:48,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:57:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1176779391, now seen corresponding path program 52 times [2021-12-17 10:57:48,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:57:48,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077621139] [2021-12-17 10:57:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:57:48,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:57:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:57:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 731 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:49,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:57:49,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077621139] [2021-12-17 10:57:49,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077621139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:57:49,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824622763] [2021-12-17 10:57:49,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:57:49,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:49,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:57:49,737 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:57:49,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-12-17 10:57:49,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:57:49,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:57:49,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-17 10:57:49,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:57:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:52,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:57:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:54,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824622763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:57:54,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:57:54,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 149 [2021-12-17 10:57:54,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897437063] [2021-12-17 10:57:54,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:57:54,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-12-17 10:57:54,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:57:54,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-12-17 10:57:54,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4044, Invalid=18008, Unknown=0, NotChecked=0, Total=22052 [2021-12-17 10:57:54,162 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 149 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:57:56,563 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2021-12-17 10:57:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-17 10:57:56,563 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 149 states have internal predecessors, (299), 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 125 [2021-12-17 10:57:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:57:56,564 INFO L225 Difference]: With dead ends: 255 [2021-12-17 10:57:56,564 INFO L226 Difference]: Without dead ends: 188 [2021-12-17 10:57:56,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13431 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6503, Invalid=26077, Unknown=0, NotChecked=0, Total=32580 [2021-12-17 10:57:56,565 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 166 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:57:56,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 117 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:57:56,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-17 10:57:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-12-17 10:57:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2021-12-17 10:57:56,618 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 125 [2021-12-17 10:57:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:57:56,618 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2021-12-17 10:57:56,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 149 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:57:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2021-12-17 10:57:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 10:57:56,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:57:56,619 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:57:56,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-12-17 10:57:56,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-12-17 10:57:56,819 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:57:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:57:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash -52958497, now seen corresponding path program 52 times [2021-12-17 10:57:56,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:57:56,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232180056] [2021-12-17 10:57:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:57:56,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:57:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:57:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 676 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:57:58,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:57:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232180056] [2021-12-17 10:57:58,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232180056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:57:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102978949] [2021-12-17 10:57:58,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:57:58,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:57:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:57:58,455 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:57:58,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-12-17 10:57:58,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:57:58,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:57:58,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-17 10:57:58,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:58:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:00,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:58:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:02,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102978949] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:58:02,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:58:02,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 149 [2021-12-17 10:58:02,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125953400] [2021-12-17 10:58:02,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:58:02,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-12-17 10:58:02,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:58:02,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-12-17 10:58:02,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4071, Invalid=17981, Unknown=0, NotChecked=0, Total=22052 [2021-12-17 10:58:02,524 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 149 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:58:04,133 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2021-12-17 10:58:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-17 10:58:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 149 states have internal predecessors, (301), 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 125 [2021-12-17 10:58:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:58:04,133 INFO L225 Difference]: With dead ends: 197 [2021-12-17 10:58:04,134 INFO L226 Difference]: Without dead ends: 191 [2021-12-17 10:58:04,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14137 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8170, Invalid=24050, Unknown=0, NotChecked=0, Total=32220 [2021-12-17 10:58:04,135 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 560 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:58:04,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 62 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:58:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-17 10:58:04,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2021-12-17 10:58:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2021-12-17 10:58:04,186 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 125 [2021-12-17 10:58:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:58:04,186 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2021-12-17 10:58:04,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 149 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2021-12-17 10:58:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 10:58:04,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:58:04,187 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:58:04,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-12-17 10:58:04,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:58:04,391 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:58:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:58:04,392 INFO L85 PathProgramCache]: Analyzing trace with hash 922396481, now seen corresponding path program 53 times [2021-12-17 10:58:04,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:58:04,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968713818] [2021-12-17 10:58:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:58:04,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:58:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:58:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 729 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:05,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:58:05,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968713818] [2021-12-17 10:58:05,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968713818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:58:05,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979124714] [2021-12-17 10:58:05,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:58:05,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:58:05,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:58:05,736 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:58:05,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-12-17 10:58:05,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-12-17 10:58:05,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:58:05,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-17 10:58:05,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:58:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:08,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:58:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:10,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979124714] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:58:10,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:58:10,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 156 [2021-12-17 10:58:10,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279730254] [2021-12-17 10:58:10,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:58:10,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2021-12-17 10:58:10,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:58:10,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-12-17 10:58:10,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4301, Invalid=19879, Unknown=0, NotChecked=0, Total=24180 [2021-12-17 10:58:10,670 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:58:14,232 INFO L93 Difference]: Finished difference Result 333 states and 338 transitions. [2021-12-17 10:58:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-17 10:58:14,233 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 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 127 [2021-12-17 10:58:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:58:14,233 INFO L225 Difference]: With dead ends: 333 [2021-12-17 10:58:14,233 INFO L226 Difference]: Without dead ends: 264 [2021-12-17 10:58:14,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15043 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=7109, Invalid=29563, Unknown=0, NotChecked=0, Total=36672 [2021-12-17 10:58:14,234 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 310 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:58:14,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 168 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:58:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-17 10:58:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 192. [2021-12-17 10:58:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2021-12-17 10:58:14,287 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 127 [2021-12-17 10:58:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:58:14,287 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2021-12-17 10:58:14,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2021-12-17 10:58:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 10:58:14,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:58:14,288 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:58:14,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-12-17 10:58:14,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-12-17 10:58:14,488 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:58:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:58:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash 188582013, now seen corresponding path program 53 times [2021-12-17 10:58:14,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:58:14,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857837060] [2021-12-17 10:58:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:58:14,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:58:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:58:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 729 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:16,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:58:16,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857837060] [2021-12-17 10:58:16,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857837060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:58:16,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183190612] [2021-12-17 10:58:16,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:58:16,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:58:16,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:58:16,224 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:58:16,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-12-17 10:58:16,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-12-17 10:58:16,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:58:16,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-17 10:58:16,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:58:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:18,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:58:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:20,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183190612] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:58:20,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:58:20,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 155 [2021-12-17 10:58:20,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64599459] [2021-12-17 10:58:20,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:58:20,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-12-17 10:58:20,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:58:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-12-17 10:58:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4320, Invalid=19550, Unknown=0, NotChecked=0, Total=23870 [2021-12-17 10:58:20,557 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 155 states, 155 states have (on average 1.9935483870967743) internal successors, (309), 155 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:58:22,499 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2021-12-17 10:58:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-17 10:58:22,499 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.9935483870967743) internal successors, (309), 155 states have internal predecessors, (309), 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 127 [2021-12-17 10:58:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:58:22,500 INFO L225 Difference]: With dead ends: 215 [2021-12-17 10:58:22,500 INFO L226 Difference]: Without dead ends: 209 [2021-12-17 10:58:22,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15499 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8863, Invalid=26669, Unknown=0, NotChecked=0, Total=35532 [2021-12-17 10:58:22,501 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 385 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:58:22,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 130 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:58:22,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-17 10:58:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 194. [2021-12-17 10:58:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2021-12-17 10:58:22,548 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 127 [2021-12-17 10:58:22,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:58:22,548 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2021-12-17 10:58:22,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.9935483870967743) internal successors, (309), 155 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2021-12-17 10:58:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 10:58:22,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:58:22,549 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:58:22,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-12-17 10:58:22,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:58:22,749 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:58:22,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:58:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1407214369, now seen corresponding path program 54 times [2021-12-17 10:58:22,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:58:22,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802836220] [2021-12-17 10:58:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:58:22,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:58:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:58:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 786 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:24,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:58:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802836220] [2021-12-17 10:58:24,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802836220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:58:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867905453] [2021-12-17 10:58:24,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:58:24,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:58:24,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:58:24,089 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:58:24,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-12-17 10:58:24,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2021-12-17 10:58:24,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:58:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-17 10:58:24,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:58:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:26,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:58:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:28,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867905453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:58:28,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:58:28,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 154 [2021-12-17 10:58:28,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398736644] [2021-12-17 10:58:28,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:58:28,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2021-12-17 10:58:28,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:58:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-12-17 10:58:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4318, Invalid=19244, Unknown=0, NotChecked=0, Total=23562 [2021-12-17 10:58:28,848 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 154 states, 154 states have (on average 2.0064935064935066) internal successors, (309), 154 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:58:31,470 INFO L93 Difference]: Finished difference Result 263 states and 267 transitions. [2021-12-17 10:58:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-17 10:58:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0064935064935066) internal successors, (309), 154 states have internal predecessors, (309), 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 129 [2021-12-17 10:58:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:58:31,471 INFO L225 Difference]: With dead ends: 263 [2021-12-17 10:58:31,471 INFO L226 Difference]: Without dead ends: 194 [2021-12-17 10:58:31,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14360 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=6936, Invalid=27846, Unknown=0, NotChecked=0, Total=34782 [2021-12-17 10:58:31,473 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 125 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:58:31,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 101 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:58:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-17 10:58:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-12-17 10:58:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2021-12-17 10:58:31,528 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 129 [2021-12-17 10:58:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:58:31,528 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2021-12-17 10:58:31,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.0064935064935066) internal successors, (309), 154 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2021-12-17 10:58:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 10:58:31,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:58:31,529 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:58:31,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-12-17 10:58:31,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-12-17 10:58:31,729 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:58:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:58:31,730 INFO L85 PathProgramCache]: Analyzing trace with hash 452488639, now seen corresponding path program 54 times [2021-12-17 10:58:31,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:58:31,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591145145] [2021-12-17 10:58:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:58:31,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:58:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:58:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 729 proven. 896 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:33,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:58:33,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591145145] [2021-12-17 10:58:33,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591145145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:58:33,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48438950] [2021-12-17 10:58:33,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:58:33,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:58:33,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:58:33,477 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:58:33,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-12-17 10:58:33,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2021-12-17 10:58:33,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:58:33,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-17 10:58:33,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:58:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:36,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:58:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:37,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48438950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:58:37,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:58:37,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 154 [2021-12-17 10:58:37,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998244806] [2021-12-17 10:58:37,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:58:37,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2021-12-17 10:58:37,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:58:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-12-17 10:58:37,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4346, Invalid=19216, Unknown=0, NotChecked=0, Total=23562 [2021-12-17 10:58:37,875 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 154 states, 154 states have (on average 2.0194805194805197) internal successors, (311), 154 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:39,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:58:39,632 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2021-12-17 10:58:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-17 10:58:39,633 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0194805194805197) internal successors, (311), 154 states have internal predecessors, (311), 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 129 [2021-12-17 10:58:39,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:58:39,633 INFO L225 Difference]: With dead ends: 203 [2021-12-17 10:58:39,633 INFO L226 Difference]: Without dead ends: 197 [2021-12-17 10:58:39,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 164 SyntacticMatches, 4 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15120 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8721, Invalid=25689, Unknown=0, NotChecked=0, Total=34410 [2021-12-17 10:58:39,635 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 371 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:58:39,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 68 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:58:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-17 10:58:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2021-12-17 10:58:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2021-12-17 10:58:39,692 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 129 [2021-12-17 10:58:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:58:39,692 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2021-12-17 10:58:39,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.0194805194805197) internal successors, (311), 154 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2021-12-17 10:58:39,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 10:58:39,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:58:39,692 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:58:39,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-12-17 10:58:39,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-12-17 10:58:39,893 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:58:39,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:58:39,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1325789729, now seen corresponding path program 55 times [2021-12-17 10:58:39,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:58:39,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067871470] [2021-12-17 10:58:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:58:39,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:58:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:58:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 784 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:41,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:58:41,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067871470] [2021-12-17 10:58:41,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067871470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:58:41,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192036388] [2021-12-17 10:58:41,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:58:41,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:58:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:58:41,365 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:58:41,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-12-17 10:58:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:58:41,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-17 10:58:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:58:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:44,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:58:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:46,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192036388] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:58:46,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:58:46,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 161 [2021-12-17 10:58:46,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460240322] [2021-12-17 10:58:46,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:58:46,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2021-12-17 10:58:46,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:58:46,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-12-17 10:58:46,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4583, Invalid=21177, Unknown=0, NotChecked=0, Total=25760 [2021-12-17 10:58:46,582 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 161 states, 161 states have (on average 1.9813664596273293) internal successors, (319), 161 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:58:50,888 INFO L93 Difference]: Finished difference Result 343 states and 348 transitions. [2021-12-17 10:58:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 10:58:50,888 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.9813664596273293) internal successors, (319), 161 states have internal predecessors, (319), 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 131 [2021-12-17 10:58:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:58:50,889 INFO L225 Difference]: With dead ends: 343 [2021-12-17 10:58:50,889 INFO L226 Difference]: Without dead ends: 272 [2021-12-17 10:58:50,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16026 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=7560, Invalid=31446, Unknown=0, NotChecked=0, Total=39006 [2021-12-17 10:58:50,890 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 231 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:58:50,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 127 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:58:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-17 10:58:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 198. [2021-12-17 10:58:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0253807106598984) internal successors, (202), 197 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2021-12-17 10:58:50,953 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 131 [2021-12-17 10:58:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:58:50,953 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2021-12-17 10:58:50,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.9813664596273293) internal successors, (319), 161 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2021-12-17 10:58:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 10:58:50,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:58:50,953 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:58:50,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-12-17 10:58:51,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-12-17 10:58:51,159 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:58:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:58:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2017084451, now seen corresponding path program 55 times [2021-12-17 10:58:51,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:58:51,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413394793] [2021-12-17 10:58:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:58:51,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:58:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:58:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 784 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:53,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:58:53,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413394793] [2021-12-17 10:58:53,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413394793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:58:53,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732276755] [2021-12-17 10:58:53,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:58:53,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:58:53,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:58:53,014 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:58:53,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-12-17 10:58:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:58:53,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-17 10:58:53,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:58:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:55,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:58:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:58:57,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732276755] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:58:57,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:58:57,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 160 [2021-12-17 10:58:57,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851216212] [2021-12-17 10:58:57,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:58:57,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2021-12-17 10:58:57,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:58:57,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2021-12-17 10:58:57,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4603, Invalid=20837, Unknown=0, NotChecked=0, Total=25440 [2021-12-17 10:58:57,637 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 160 states, 160 states have (on average 1.99375) internal successors, (319), 160 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:59,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:58:59,620 INFO L93 Difference]: Finished difference Result 221 states and 224 transitions. [2021-12-17 10:58:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-17 10:58:59,621 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 1.99375) internal successors, (319), 160 states have internal predecessors, (319), 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 131 [2021-12-17 10:58:59,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:58:59,621 INFO L225 Difference]: With dead ends: 221 [2021-12-17 10:58:59,621 INFO L226 Difference]: Without dead ends: 215 [2021-12-17 10:58:59,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16528 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9436, Invalid=28394, Unknown=0, NotChecked=0, Total=37830 [2021-12-17 10:58:59,623 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 649 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:58:59,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 81 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:58:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-17 10:58:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 200. [2021-12-17 10:58:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:59,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2021-12-17 10:58:59,678 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 131 [2021-12-17 10:58:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:58:59,678 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2021-12-17 10:58:59,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 1.99375) internal successors, (319), 160 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:58:59,679 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2021-12-17 10:58:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-17 10:58:59,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:58:59,679 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:58:59,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-12-17 10:58:59,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-12-17 10:58:59,880 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:58:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:58:59,880 INFO L85 PathProgramCache]: Analyzing trace with hash 661157951, now seen corresponding path program 56 times [2021-12-17 10:58:59,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:58:59,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784098780] [2021-12-17 10:58:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:58:59,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:58:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:59:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 843 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:01,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:59:01,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784098780] [2021-12-17 10:59:01,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784098780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:59:01,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325820847] [2021-12-17 10:59:01,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:59:01,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:59:01,356 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:59:01,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-12-17 10:59:01,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:59:01,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:59:01,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-17 10:59:01,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:59:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:04,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:59:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:06,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325820847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:59:06,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:59:06,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 159 [2021-12-17 10:59:06,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591128845] [2021-12-17 10:59:06,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:59:06,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-12-17 10:59:06,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:59:06,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-12-17 10:59:06,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4601, Invalid=20521, Unknown=0, NotChecked=0, Total=25122 [2021-12-17 10:59:06,303 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 159 states, 159 states have (on average 2.006289308176101) internal successors, (319), 159 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:59:09,076 INFO L93 Difference]: Finished difference Result 271 states and 275 transitions. [2021-12-17 10:59:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-17 10:59:09,076 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.006289308176101) internal successors, (319), 159 states have internal predecessors, (319), 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 133 [2021-12-17 10:59:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:59:09,076 INFO L225 Difference]: With dead ends: 271 [2021-12-17 10:59:09,077 INFO L226 Difference]: Without dead ends: 200 [2021-12-17 10:59:09,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15320 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=7383, Invalid=29673, Unknown=0, NotChecked=0, Total=37056 [2021-12-17 10:59:09,078 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 136 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:59:09,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 113 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:59:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-17 10:59:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-12-17 10:59:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.02020202020202) internal successors, (202), 198 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 202 transitions. [2021-12-17 10:59:09,128 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 202 transitions. Word has length 133 [2021-12-17 10:59:09,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:59:09,128 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 202 transitions. [2021-12-17 10:59:09,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 2.006289308176101) internal successors, (319), 159 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 202 transitions. [2021-12-17 10:59:09,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-17 10:59:09,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:59:09,129 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:59:09,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-12-17 10:59:09,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:09,331 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:59:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:59:09,331 INFO L85 PathProgramCache]: Analyzing trace with hash -643806817, now seen corresponding path program 56 times [2021-12-17 10:59:09,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:59:09,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520013980] [2021-12-17 10:59:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:59:09,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:59:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:59:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 784 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:11,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:59:11,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520013980] [2021-12-17 10:59:11,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520013980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:59:11,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056901869] [2021-12-17 10:59:11,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:59:11,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:11,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:59:11,188 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:59:11,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-12-17 10:59:11,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:59:11,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:59:11,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-17 10:59:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:59:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:13,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:59:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:15,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056901869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:59:15,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:59:15,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 159 [2021-12-17 10:59:15,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726391333] [2021-12-17 10:59:15,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:59:15,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-12-17 10:59:15,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:59:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-12-17 10:59:15,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4630, Invalid=20492, Unknown=0, NotChecked=0, Total=25122 [2021-12-17 10:59:15,661 INFO L87 Difference]: Start difference. First operand 199 states and 202 transitions. Second operand has 159 states, 159 states have (on average 2.0377358490566038) internal successors, (324), 159 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:17,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:59:17,488 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2021-12-17 10:59:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-17 10:59:17,488 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.0377358490566038) internal successors, (324), 159 states have internal predecessors, (324), 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 133 [2021-12-17 10:59:17,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:59:17,489 INFO L225 Difference]: With dead ends: 209 [2021-12-17 10:59:17,489 INFO L226 Difference]: Without dead ends: 203 [2021-12-17 10:59:17,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16136 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9290, Invalid=27382, Unknown=0, NotChecked=0, Total=36672 [2021-12-17 10:59:17,490 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 542 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:59:17,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 91 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:59:17,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-17 10:59:17,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2021-12-17 10:59:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.02) internal successors, (204), 200 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2021-12-17 10:59:17,541 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 133 [2021-12-17 10:59:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:59:17,541 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2021-12-17 10:59:17,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 2.0377358490566038) internal successors, (324), 159 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2021-12-17 10:59:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 10:59:17,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:59:17,542 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:59:17,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-12-17 10:59:17,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:17,742 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:59:17,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:59:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash 52844033, now seen corresponding path program 57 times [2021-12-17 10:59:17,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:59:17,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084501123] [2021-12-17 10:59:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:59:17,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:59:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:59:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 841 proven. 959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:19,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:59:19,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084501123] [2021-12-17 10:59:19,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084501123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:59:19,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336533267] [2021-12-17 10:59:19,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:59:19,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:19,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:59:19,224 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:59:19,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-12-17 10:59:19,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-12-17 10:59:19,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:59:19,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 10:59:19,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:59:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:22,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:59:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:24,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336533267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:59:24,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:59:24,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 166 [2021-12-17 10:59:24,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11584082] [2021-12-17 10:59:24,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:59:24,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2021-12-17 10:59:24,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:59:24,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2021-12-17 10:59:24,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4874, Invalid=22516, Unknown=0, NotChecked=0, Total=27390 [2021-12-17 10:59:24,632 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand has 166 states, 166 states have (on average 1.9819277108433735) internal successors, (329), 166 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:59:28,584 INFO L93 Difference]: Finished difference Result 353 states and 358 transitions. [2021-12-17 10:59:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-17 10:59:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.9819277108433735) internal successors, (329), 166 states have internal predecessors, (329), 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 135 [2021-12-17 10:59:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:59:28,585 INFO L225 Difference]: With dead ends: 353 [2021-12-17 10:59:28,585 INFO L226 Difference]: Without dead ends: 280 [2021-12-17 10:59:28,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 168 SyntacticMatches, 4 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17040 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=8025, Invalid=33387, Unknown=0, NotChecked=0, Total=41412 [2021-12-17 10:59:28,587 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 332 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:59:28,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 179 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:59:28,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-17 10:59:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 204. [2021-12-17 10:59:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 203 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2021-12-17 10:59:28,646 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 135 [2021-12-17 10:59:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:59:28,646 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2021-12-17 10:59:28,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.9819277108433735) internal successors, (329), 166 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2021-12-17 10:59:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 10:59:28,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:59:28,647 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:59:28,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-12-17 10:59:28,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:28,848 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:59:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:59:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1959454781, now seen corresponding path program 57 times [2021-12-17 10:59:28,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:59:28,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627435517] [2021-12-17 10:59:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:59:28,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:59:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:59:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 841 proven. 959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:30,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:59:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627435517] [2021-12-17 10:59:30,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627435517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:59:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635583986] [2021-12-17 10:59:30,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:59:30,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:30,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:59:30,796 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:59:30,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-12-17 10:59:30,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-12-17 10:59:30,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:59:30,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 10:59:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:59:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:33,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:59:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:35,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635583986] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:59:35,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:59:35,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 165 [2021-12-17 10:59:35,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916325020] [2021-12-17 10:59:35,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:59:35,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2021-12-17 10:59:35,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:59:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2021-12-17 10:59:35,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4895, Invalid=22165, Unknown=0, NotChecked=0, Total=27060 [2021-12-17 10:59:35,656 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 165 states, 165 states have (on average 1.993939393939394) internal successors, (329), 165 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:37,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:59:37,809 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2021-12-17 10:59:37,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-17 10:59:37,809 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.993939393939394) internal successors, (329), 165 states have internal predecessors, (329), 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 135 [2021-12-17 10:59:37,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:59:37,810 INFO L225 Difference]: With dead ends: 227 [2021-12-17 10:59:37,810 INFO L226 Difference]: Without dead ends: 221 [2021-12-17 10:59:37,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 168 SyntacticMatches, 5 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17590 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=10027, Invalid=30173, Unknown=0, NotChecked=0, Total=40200 [2021-12-17 10:59:37,812 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 488 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 10:59:37,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 123 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 10:59:37,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-17 10:59:37,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 206. [2021-12-17 10:59:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.024390243902439) internal successors, (210), 205 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2021-12-17 10:59:37,864 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 135 [2021-12-17 10:59:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:59:37,865 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2021-12-17 10:59:37,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.993939393939394) internal successors, (329), 165 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2021-12-17 10:59:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-17 10:59:37,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:59:37,865 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:59:37,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-12-17 10:59:38,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:38,066 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:59:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:59:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash -405533537, now seen corresponding path program 58 times [2021-12-17 10:59:38,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:59:38,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965148575] [2021-12-17 10:59:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:59:38,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:59:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:59:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 902 proven. 959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:39,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:59:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965148575] [2021-12-17 10:59:39,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965148575] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:59:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231153181] [2021-12-17 10:59:39,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:59:39,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:39,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:59:39,540 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:59:39,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-12-17 10:59:39,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:59:39,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:59:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-17 10:59:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:59:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:42,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:59:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:44,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231153181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:59:44,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:59:44,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 164 [2021-12-17 10:59:44,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289365344] [2021-12-17 10:59:44,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:59:44,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2021-12-17 10:59:44,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:59:44,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-12-17 10:59:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4893, Invalid=21839, Unknown=0, NotChecked=0, Total=26732 [2021-12-17 10:59:44,817 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 164 states, 164 states have (on average 2.0060975609756095) internal successors, (329), 164 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:59:47,824 INFO L93 Difference]: Finished difference Result 279 states and 283 transitions. [2021-12-17 10:59:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-17 10:59:47,825 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0060975609756095) internal successors, (329), 164 states have internal predecessors, (329), 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 137 [2021-12-17 10:59:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:59:47,825 INFO L225 Difference]: With dead ends: 279 [2021-12-17 10:59:47,825 INFO L226 Difference]: Without dead ends: 206 [2021-12-17 10:59:47,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16311 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=7844, Invalid=31558, Unknown=0, NotChecked=0, Total=39402 [2021-12-17 10:59:47,827 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 121 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 10:59:47,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 110 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 10:59:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-17 10:59:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-12-17 10:59:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2021-12-17 10:59:47,880 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 137 [2021-12-17 10:59:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:59:47,880 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2021-12-17 10:59:47,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0060975609756095) internal successors, (329), 164 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2021-12-17 10:59:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-17 10:59:47,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:59:47,881 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:59:47,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-12-17 10:59:48,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:48,081 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:59:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:59:48,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2119385473, now seen corresponding path program 58 times [2021-12-17 10:59:48,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:59:48,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470341347] [2021-12-17 10:59:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:59:48,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:59:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:59:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 841 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:50,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:59:50,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470341347] [2021-12-17 10:59:50,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470341347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:59:50,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547599600] [2021-12-17 10:59:50,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:59:50,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:59:50,008 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:59:50,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-12-17 10:59:50,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:59:50,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:59:50,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-17 10:59:50,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:59:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:52,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:59:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:54,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547599600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:59:54,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:59:54,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 164 [2021-12-17 10:59:54,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386804247] [2021-12-17 10:59:54,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:59:54,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2021-12-17 10:59:54,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:59:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-12-17 10:59:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4923, Invalid=21809, Unknown=0, NotChecked=0, Total=26732 [2021-12-17 10:59:54,716 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 164 states, 164 states have (on average 2.018292682926829) internal successors, (331), 164 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:56,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:59:56,574 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2021-12-17 10:59:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-17 10:59:56,574 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.018292682926829) internal successors, (331), 164 states have internal predecessors, (331), 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 137 [2021-12-17 10:59:56,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:59:56,575 INFO L225 Difference]: With dead ends: 215 [2021-12-17 10:59:56,575 INFO L226 Difference]: Without dead ends: 209 [2021-12-17 10:59:56,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17185 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9877, Invalid=29129, Unknown=0, NotChecked=0, Total=39006 [2021-12-17 10:59:56,576 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 656 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 10:59:56,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 55 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 10:59:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-17 10:59:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2021-12-17 10:59:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2021-12-17 10:59:56,633 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 137 [2021-12-17 10:59:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:59:56,633 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2021-12-17 10:59:56,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.018292682926829) internal successors, (331), 164 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:59:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2021-12-17 10:59:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 10:59:56,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:59:56,633 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:59:56,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-12-17 10:59:56,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-12-17 10:59:56,834 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:59:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:59:56,834 INFO L85 PathProgramCache]: Analyzing trace with hash -639036703, now seen corresponding path program 59 times [2021-12-17 10:59:56,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:59:56,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242979400] [2021-12-17 10:59:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:59:56,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:59:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:59:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 900 proven. 1022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:59:58,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:59:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242979400] [2021-12-17 10:59:58,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242979400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:59:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058785013] [2021-12-17 10:59:58,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:59:58,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:59:58,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:59:58,427 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:59:58,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-12-17 10:59:58,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-12-17 10:59:58,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:59:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-17 10:59:58,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:00:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:01,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:00:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:04,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058785013] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:00:04,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:00:04,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 171 [2021-12-17 11:00:04,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112345179] [2021-12-17 11:00:04,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:00:04,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2021-12-17 11:00:04,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:00:04,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2021-12-17 11:00:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5174, Invalid=23896, Unknown=0, NotChecked=0, Total=29070 [2021-12-17 11:00:04,082 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 171 states, 171 states have (on average 1.9824561403508771) internal successors, (339), 171 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:00:08,920 INFO L93 Difference]: Finished difference Result 363 states and 368 transitions. [2021-12-17 11:00:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-17 11:00:08,921 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.9824561403508771) internal successors, (339), 171 states have internal predecessors, (339), 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 139 [2021-12-17 11:00:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:00:08,921 INFO L225 Difference]: With dead ends: 363 [2021-12-17 11:00:08,921 INFO L226 Difference]: Without dead ends: 288 [2021-12-17 11:00:08,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18085 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=8504, Invalid=35386, Unknown=0, NotChecked=0, Total=43890 [2021-12-17 11:00:08,923 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 347 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:00:08,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 193 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 11:00:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-17 11:00:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 210. [2021-12-17 11:00:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0239234449760766) internal successors, (214), 209 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2021-12-17 11:00:08,986 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 139 [2021-12-17 11:00:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:00:08,986 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2021-12-17 11:00:08,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.9824561403508771) internal successors, (339), 171 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2021-12-17 11:00:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 11:00:08,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:00:08,987 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:00:09,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-12-17 11:00:09,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-12-17 11:00:09,188 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:00:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:00:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash -563982947, now seen corresponding path program 59 times [2021-12-17 11:00:09,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:00:09,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839930453] [2021-12-17 11:00:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:00:09,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:00:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:00:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 900 proven. 1022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:11,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:00:11,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839930453] [2021-12-17 11:00:11,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839930453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:00:11,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913445809] [2021-12-17 11:00:11,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 11:00:11,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:00:11,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:00:11,249 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:00:11,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-12-17 11:00:11,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-12-17 11:00:11,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:00:11,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-17 11:00:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:00:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:14,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:00:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:16,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913445809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:00:16,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:00:16,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 170 [2021-12-17 11:00:16,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097776501] [2021-12-17 11:00:16,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:00:16,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2021-12-17 11:00:16,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:00:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2021-12-17 11:00:16,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5196, Invalid=23534, Unknown=0, NotChecked=0, Total=28730 [2021-12-17 11:00:16,662 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 170 states, 170 states have (on average 1.9941176470588236) internal successors, (339), 170 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:00:18,924 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2021-12-17 11:00:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-17 11:00:18,924 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.9941176470588236) internal successors, (339), 170 states have internal predecessors, (339), 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 139 [2021-12-17 11:00:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:00:18,925 INFO L225 Difference]: With dead ends: 233 [2021-12-17 11:00:18,925 INFO L226 Difference]: Without dead ends: 227 [2021-12-17 11:00:18,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18685 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=10636, Invalid=32006, Unknown=0, NotChecked=0, Total=42642 [2021-12-17 11:00:18,926 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 852 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:00:18,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 118 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 11:00:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-17 11:00:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2021-12-17 11:00:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.0236966824644549) internal successors, (216), 211 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2021-12-17 11:00:18,984 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 139 [2021-12-17 11:00:18,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:00:18,984 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2021-12-17 11:00:18,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.9941176470588236) internal successors, (339), 170 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2021-12-17 11:00:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 11:00:18,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:00:18,985 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:00:19,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-12-17 11:00:19,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-12-17 11:00:19,186 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:00:19,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:00:19,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1227332095, now seen corresponding path program 60 times [2021-12-17 11:00:19,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:00:19,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216565685] [2021-12-17 11:00:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:00:19,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:00:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:00:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 963 proven. 1022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:20,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:00:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216565685] [2021-12-17 11:00:20,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216565685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:00:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142232687] [2021-12-17 11:00:20,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 11:00:20,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:00:20,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:00:20,751 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:00:20,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-12-17 11:00:20,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-12-17 11:00:20,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:00:20,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-17 11:00:20,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:00:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:24,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:00:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:26,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142232687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:00:26,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:00:26,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 169 [2021-12-17 11:00:26,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012856659] [2021-12-17 11:00:26,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:00:26,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2021-12-17 11:00:26,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:00:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-12-17 11:00:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5194, Invalid=23198, Unknown=0, NotChecked=0, Total=28392 [2021-12-17 11:00:26,383 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 169 states, 169 states have (on average 2.0059171597633134) internal successors, (339), 169 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:00:29,644 INFO L93 Difference]: Finished difference Result 287 states and 291 transitions. [2021-12-17 11:00:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 11:00:29,644 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0059171597633134) internal successors, (339), 169 states have internal predecessors, (339), 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 141 [2021-12-17 11:00:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:00:29,645 INFO L225 Difference]: With dead ends: 287 [2021-12-17 11:00:29,645 INFO L226 Difference]: Without dead ends: 212 [2021-12-17 11:00:29,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17333 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=8319, Invalid=33501, Unknown=0, NotChecked=0, Total=41820 [2021-12-17 11:00:29,647 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 187 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:00:29,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 123 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 11:00:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-17 11:00:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-12-17 11:00:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.019047619047619) internal successors, (214), 210 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2021-12-17 11:00:29,712 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 141 [2021-12-17 11:00:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:00:29,712 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2021-12-17 11:00:29,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.0059171597633134) internal successors, (339), 169 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2021-12-17 11:00:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 11:00:29,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:00:29,713 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:00:29,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-12-17 11:00:29,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-12-17 11:00:29,914 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:00:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:00:29,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1709902943, now seen corresponding path program 60 times [2021-12-17 11:00:29,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:00:29,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801363782] [2021-12-17 11:00:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:00:29,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:00:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:00:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 900 proven. 1085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:32,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:00:32,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801363782] [2021-12-17 11:00:32,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801363782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:00:32,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889579716] [2021-12-17 11:00:32,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 11:00:32,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:00:32,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:00:32,040 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:00:32,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-12-17 11:00:32,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-12-17 11:00:32,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:00:32,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-17 11:00:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:00:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:35,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:00:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:37,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889579716] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:00:37,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:00:37,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 169 [2021-12-17 11:00:37,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132401185] [2021-12-17 11:00:37,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:00:37,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2021-12-17 11:00:37,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:00:37,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-12-17 11:00:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5225, Invalid=23167, Unknown=0, NotChecked=0, Total=28392 [2021-12-17 11:00:37,138 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 169 states, 169 states have (on average 2.0177514792899407) internal successors, (341), 169 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:00:39,175 INFO L93 Difference]: Finished difference Result 221 states and 224 transitions. [2021-12-17 11:00:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-17 11:00:39,175 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0177514792899407) internal successors, (341), 169 states have internal predecessors, (341), 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 141 [2021-12-17 11:00:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:00:39,176 INFO L225 Difference]: With dead ends: 221 [2021-12-17 11:00:39,176 INFO L226 Difference]: Without dead ends: 215 [2021-12-17 11:00:39,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18267 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=10482, Invalid=30930, Unknown=0, NotChecked=0, Total=41412 [2021-12-17 11:00:39,178 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 274 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:00:39,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 88 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 11:00:39,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-17 11:00:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-12-17 11:00:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 212 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2021-12-17 11:00:39,256 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 141 [2021-12-17 11:00:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:00:39,256 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2021-12-17 11:00:39,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.0177514792899407) internal successors, (341), 169 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2021-12-17 11:00:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 11:00:39,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:00:39,257 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:00:39,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-12-17 11:00:39,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:00:39,474 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:00:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:00:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1479841599, now seen corresponding path program 61 times [2021-12-17 11:00:39,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:00:39,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474528352] [2021-12-17 11:00:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:00:39,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:00:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:00:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 961 proven. 1087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:41,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:00:41,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474528352] [2021-12-17 11:00:41,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474528352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:00:41,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004509808] [2021-12-17 11:00:41,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 11:00:41,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:00:41,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:00:41,141 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:00:41,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-12-17 11:00:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:00:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-17 11:00:41,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:00:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:44,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:00:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:47,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004509808] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:00:47,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:00:47,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 176 [2021-12-17 11:00:47,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203557580] [2021-12-17 11:00:47,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:00:47,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2021-12-17 11:00:47,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:00:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2021-12-17 11:00:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5483, Invalid=25317, Unknown=0, NotChecked=0, Total=30800 [2021-12-17 11:00:47,167 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 176 states, 176 states have (on average 1.9829545454545454) internal successors, (349), 176 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:00:51,697 INFO L93 Difference]: Finished difference Result 373 states and 378 transitions. [2021-12-17 11:00:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-17 11:00:51,698 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.9829545454545454) internal successors, (349), 176 states have internal predecessors, (349), 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 143 [2021-12-17 11:00:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:00:51,699 INFO L225 Difference]: With dead ends: 373 [2021-12-17 11:00:51,699 INFO L226 Difference]: Without dead ends: 296 [2021-12-17 11:00:51,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19161 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=8997, Invalid=37443, Unknown=0, NotChecked=0, Total=46440 [2021-12-17 11:00:51,701 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 242 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:00:51,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 254 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 11:00:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-17 11:00:51,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 216. [2021-12-17 11:00:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0232558139534884) internal successors, (220), 215 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2021-12-17 11:00:51,768 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 143 [2021-12-17 11:00:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:00:51,769 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2021-12-17 11:00:51,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.9829545454545454) internal successors, (349), 176 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:00:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2021-12-17 11:00:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 11:00:51,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:00:51,769 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:00:51,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-12-17 11:00:51,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:00:51,971 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:00:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:00:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash -594465795, now seen corresponding path program 61 times [2021-12-17 11:00:51,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:00:51,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083508244] [2021-12-17 11:00:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:00:51,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:00:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:00:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 961 proven. 1087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:54,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:00:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083508244] [2021-12-17 11:00:54,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083508244] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:00:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550212111] [2021-12-17 11:00:54,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 11:00:54,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:00:54,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:00:54,131 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:00:54,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-12-17 11:00:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:00:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-17 11:00:54,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:00:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:57,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:00:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:00:59,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550212111] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:00:59,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:00:59,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 175 [2021-12-17 11:00:59,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511521627] [2021-12-17 11:00:59,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:00:59,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2021-12-17 11:00:59,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:00:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2021-12-17 11:00:59,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5506, Invalid=24944, Unknown=0, NotChecked=0, Total=30450 [2021-12-17 11:00:59,553 INFO L87 Difference]: Start difference. First operand 216 states and 220 transitions. Second operand has 175 states, 175 states have (on average 1.9942857142857142) internal successors, (349), 175 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:01:01,785 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2021-12-17 11:01:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-17 11:01:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 1.9942857142857142) internal successors, (349), 175 states have internal predecessors, (349), 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 143 [2021-12-17 11:01:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:01:01,786 INFO L225 Difference]: With dead ends: 239 [2021-12-17 11:01:01,786 INFO L226 Difference]: Without dead ends: 233 [2021-12-17 11:01:01,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 178 SyntacticMatches, 5 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19813 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=11263, Invalid=33893, Unknown=0, NotChecked=0, Total=45156 [2021-12-17 11:01:01,788 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 429 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:01:01,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 78 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 11:01:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-17 11:01:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 218. [2021-12-17 11:01:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.023041474654378) internal successors, (222), 217 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 222 transitions. [2021-12-17 11:01:01,877 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 222 transitions. Word has length 143 [2021-12-17 11:01:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:01:01,878 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 222 transitions. [2021-12-17 11:01:01,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 1.9942857142857142) internal successors, (349), 175 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 222 transitions. [2021-12-17 11:01:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 11:01:01,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:01:01,878 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:01:01,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-12-17 11:01:02,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-12-17 11:01:02,079 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:01:02,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:01:02,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1998086239, now seen corresponding path program 62 times [2021-12-17 11:01:02,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:01:02,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304211105] [2021-12-17 11:01:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:01:02,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:01:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:01:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1026 proven. 1087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:03,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:01:03,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304211105] [2021-12-17 11:01:03,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304211105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:01:03,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811033609] [2021-12-17 11:01:03,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:01:03,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:01:03,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:01:03,685 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:01:03,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-12-17 11:01:03,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:01:03,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:01:03,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-17 11:01:03,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:01:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:07,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:01:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:09,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811033609] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:01:09,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:01:09,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 174 [2021-12-17 11:01:09,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5638821] [2021-12-17 11:01:09,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:01:09,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2021-12-17 11:01:09,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:01:09,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2021-12-17 11:01:09,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5504, Invalid=24598, Unknown=0, NotChecked=0, Total=30102 [2021-12-17 11:01:09,572 INFO L87 Difference]: Start difference. First operand 218 states and 222 transitions. Second operand has 174 states, 174 states have (on average 2.0057471264367814) internal successors, (349), 174 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:01:12,788 INFO L93 Difference]: Finished difference Result 295 states and 299 transitions. [2021-12-17 11:01:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-17 11:01:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 2.0057471264367814) internal successors, (349), 174 states have internal predecessors, (349), 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 145 [2021-12-17 11:01:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:01:12,789 INFO L225 Difference]: With dead ends: 295 [2021-12-17 11:01:12,789 INFO L226 Difference]: Without dead ends: 218 [2021-12-17 11:01:12,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18386 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=8808, Invalid=35502, Unknown=0, NotChecked=0, Total=44310 [2021-12-17 11:01:12,791 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 185 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:01:12,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 136 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 11:01:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-17 11:01:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-12-17 11:01:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0185185185185186) internal successors, (220), 216 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2021-12-17 11:01:12,859 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 145 [2021-12-17 11:01:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:01:12,859 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2021-12-17 11:01:12,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 2.0057471264367814) internal successors, (349), 174 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:12,859 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2021-12-17 11:01:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 11:01:12,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:01:12,859 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:01:12,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-12-17 11:01:13,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-12-17 11:01:13,060 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:01:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:01:13,060 INFO L85 PathProgramCache]: Analyzing trace with hash 119042879, now seen corresponding path program 62 times [2021-12-17 11:01:13,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:01:13,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497224517] [2021-12-17 11:01:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:01:13,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:01:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:01:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 961 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:15,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:01:15,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497224517] [2021-12-17 11:01:15,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497224517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:01:15,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975190382] [2021-12-17 11:01:15,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:01:15,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:01:15,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:01:15,237 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:01:15,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-12-17 11:01:15,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:01:15,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:01:15,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-17 11:01:15,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:01:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:18,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:01:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:20,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975190382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:01:20,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:01:20,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 174 [2021-12-17 11:01:20,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319982438] [2021-12-17 11:01:20,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:01:20,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2021-12-17 11:01:20,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:01:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2021-12-17 11:01:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5536, Invalid=24566, Unknown=0, NotChecked=0, Total=30102 [2021-12-17 11:01:20,522 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand has 174 states, 174 states have (on average 2.0172413793103448) internal successors, (351), 174 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:01:22,639 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2021-12-17 11:01:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-17 11:01:22,640 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 2.0172413793103448) internal successors, (351), 174 states have internal predecessors, (351), 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 145 [2021-12-17 11:01:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:01:22,640 INFO L225 Difference]: With dead ends: 227 [2021-12-17 11:01:22,640 INFO L226 Difference]: Without dead ends: 221 [2021-12-17 11:01:22,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 184 SyntacticMatches, 4 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19382 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11105, Invalid=32785, Unknown=0, NotChecked=0, Total=43890 [2021-12-17 11:01:22,642 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 409 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:01:22,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 56 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 11:01:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-17 11:01:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2021-12-17 11:01:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.018348623853211) internal successors, (222), 218 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2021-12-17 11:01:22,713 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 145 [2021-12-17 11:01:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:01:22,713 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2021-12-17 11:01:22,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 2.0172413793103448) internal successors, (351), 174 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2021-12-17 11:01:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 11:01:22,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:01:22,714 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:01:22,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-12-17 11:01:22,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:01:22,915 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:01:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:01:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1288005727, now seen corresponding path program 63 times [2021-12-17 11:01:22,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:01:22,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925011756] [2021-12-17 11:01:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:01:22,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:01:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:01:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1024 proven. 1154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:24,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:01:24,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925011756] [2021-12-17 11:01:24,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925011756] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:01:24,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940553391] [2021-12-17 11:01:24,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:01:24,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:01:24,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:01:24,674 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:01:24,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-12-17 11:01:24,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-12-17 11:01:24,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:01:24,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-17 11:01:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:01:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:28,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:01:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:30,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940553391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:01:30,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:01:30,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 181 [2021-12-17 11:01:30,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774739774] [2021-12-17 11:01:30,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:01:30,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 181 states [2021-12-17 11:01:30,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:01:30,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2021-12-17 11:01:30,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5801, Invalid=26779, Unknown=0, NotChecked=0, Total=32580 [2021-12-17 11:01:30,959 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 181 states, 181 states have (on average 1.9834254143646408) internal successors, (359), 181 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:01:35,565 INFO L93 Difference]: Finished difference Result 383 states and 388 transitions. [2021-12-17 11:01:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-17 11:01:35,566 INFO L78 Accepts]: Start accepts. Automaton has has 181 states, 181 states have (on average 1.9834254143646408) internal successors, (359), 181 states have internal predecessors, (359), 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 147 [2021-12-17 11:01:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:01:35,566 INFO L225 Difference]: With dead ends: 383 [2021-12-17 11:01:35,566 INFO L226 Difference]: Without dead ends: 304 [2021-12-17 11:01:35,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20268 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=9504, Invalid=39558, Unknown=0, NotChecked=0, Total=49062 [2021-12-17 11:01:35,568 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 243 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:01:35,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 174 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 11:01:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-17 11:01:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 222. [2021-12-17 11:01:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.0226244343891402) internal successors, (226), 221 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 226 transitions. [2021-12-17 11:01:35,630 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 226 transitions. Word has length 147 [2021-12-17 11:01:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:01:35,631 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 226 transitions. [2021-12-17 11:01:35,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 181 states, 181 states have (on average 1.9834254143646408) internal successors, (359), 181 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 226 transitions. [2021-12-17 11:01:35,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 11:01:35,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:01:35,631 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:01:35,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-12-17 11:01:35,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:01:35,832 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:01:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:01:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash 927777629, now seen corresponding path program 63 times [2021-12-17 11:01:35,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:01:35,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051181701] [2021-12-17 11:01:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:01:35,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:01:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:01:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1024 proven. 1154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:38,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:01:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051181701] [2021-12-17 11:01:38,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051181701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:01:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193804651] [2021-12-17 11:01:38,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:01:38,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:01:38,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:01:38,165 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:01:38,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-12-17 11:01:38,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-12-17 11:01:38,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:01:38,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-17 11:01:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:01:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:41,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:01:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:43,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193804651] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:01:43,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:01:43,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 180 [2021-12-17 11:01:43,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661251029] [2021-12-17 11:01:43,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:01:43,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2021-12-17 11:01:43,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:01:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2021-12-17 11:01:43,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5825, Invalid=26395, Unknown=0, NotChecked=0, Total=32220 [2021-12-17 11:01:43,907 INFO L87 Difference]: Start difference. First operand 222 states and 226 transitions. Second operand has 180 states, 180 states have (on average 1.9944444444444445) internal successors, (359), 180 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:01:46,435 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2021-12-17 11:01:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-17 11:01:46,435 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 180 states have (on average 1.9944444444444445) internal successors, (359), 180 states have internal predecessors, (359), 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 147 [2021-12-17 11:01:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:01:46,436 INFO L225 Difference]: With dead ends: 245 [2021-12-17 11:01:46,436 INFO L226 Difference]: Without dead ends: 239 [2021-12-17 11:01:46,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20974 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11908, Invalid=35834, Unknown=0, NotChecked=0, Total=47742 [2021-12-17 11:01:46,438 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 376 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:01:46,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 102 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 11:01:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-17 11:01:46,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 224. [2021-12-17 11:01:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0224215246636772) internal successors, (228), 223 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 228 transitions. [2021-12-17 11:01:46,502 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 228 transitions. Word has length 147 [2021-12-17 11:01:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:01:46,502 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 228 transitions. [2021-12-17 11:01:46,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 180 states have (on average 1.9944444444444445) internal successors, (359), 180 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 228 transitions. [2021-12-17 11:01:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-17 11:01:46,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:01:46,503 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:01:46,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-12-17 11:01:46,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:01:46,704 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:01:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:01:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash 290168767, now seen corresponding path program 64 times [2021-12-17 11:01:46,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:01:46,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130075364] [2021-12-17 11:01:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:01:46,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:01:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:01:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1091 proven. 1154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:48,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:01:48,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130075364] [2021-12-17 11:01:48,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130075364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:01:48,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216422689] [2021-12-17 11:01:48,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 11:01:48,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:01:48,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:01:48,435 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:01:48,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-12-17 11:01:48,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 11:01:48,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:01:48,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-17 11:01:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:01:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:51,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:01:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:01:54,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216422689] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:01:54,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:01:54,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 179 [2021-12-17 11:01:54,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300701938] [2021-12-17 11:01:54,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:01:54,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2021-12-17 11:01:54,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:01:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-12-17 11:01:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5823, Invalid=26039, Unknown=0, NotChecked=0, Total=31862 [2021-12-17 11:01:54,502 INFO L87 Difference]: Start difference. First operand 224 states and 228 transitions. Second operand has 179 states, 179 states have (on average 2.005586592178771) internal successors, (359), 179 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:57,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:01:57,928 INFO L93 Difference]: Finished difference Result 303 states and 307 transitions. [2021-12-17 11:01:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-17 11:01:57,928 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.005586592178771) internal successors, (359), 179 states have internal predecessors, (359), 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 149 [2021-12-17 11:01:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:01:57,929 INFO L225 Difference]: With dead ends: 303 [2021-12-17 11:01:57,929 INFO L226 Difference]: Without dead ends: 224 [2021-12-17 11:01:57,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19470 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=9311, Invalid=37561, Unknown=0, NotChecked=0, Total=46872 [2021-12-17 11:01:57,931 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 293 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:01:57,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 100 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 11:01:57,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-17 11:01:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-12-17 11:01:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.018018018018018) internal successors, (226), 222 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2021-12-17 11:01:58,014 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 149 [2021-12-17 11:01:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:01:58,015 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2021-12-17 11:01:58,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 2.005586592178771) internal successors, (359), 179 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:01:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2021-12-17 11:01:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-17 11:01:58,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:01:58,015 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:01:58,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-12-17 11:01:58,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-12-17 11:01:58,216 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:01:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:01:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash 937571103, now seen corresponding path program 64 times [2021-12-17 11:01:58,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:01:58,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181003525] [2021-12-17 11:01:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:01:58,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:01:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1024 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:00,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:00,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181003525] [2021-12-17 11:02:00,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181003525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:02:00,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874870203] [2021-12-17 11:02:00,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 11:02:00,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:00,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:00,520 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:02:00,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-12-17 11:02:00,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 11:02:00,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:02:00,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-17 11:02:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:03,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:06,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874870203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:02:06,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:02:06,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 179 [2021-12-17 11:02:06,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923300280] [2021-12-17 11:02:06,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:02:06,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2021-12-17 11:02:06,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:06,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-12-17 11:02:06,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5856, Invalid=26006, Unknown=0, NotChecked=0, Total=31862 [2021-12-17 11:02:06,066 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand has 179 states, 179 states have (on average 2.016759776536313) internal successors, (361), 179 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:08,178 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2021-12-17 11:02:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-17 11:02:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.016759776536313) internal successors, (361), 179 states have internal predecessors, (361), 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 149 [2021-12-17 11:02:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:08,178 INFO L225 Difference]: With dead ends: 233 [2021-12-17 11:02:08,178 INFO L226 Difference]: Without dead ends: 227 [2021-12-17 11:02:08,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 189 SyntacticMatches, 4 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20530 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=11746, Invalid=34694, Unknown=0, NotChecked=0, Total=46440 [2021-12-17 11:02:08,180 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 319 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:08,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 69 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 11:02:08,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-17 11:02:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-12-17 11:02:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0178571428571428) internal successors, (228), 224 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2021-12-17 11:02:08,244 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 149 [2021-12-17 11:02:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:08,244 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2021-12-17 11:02:08,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 2.016759776536313) internal successors, (361), 179 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:08,245 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2021-12-17 11:02:08,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 11:02:08,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:08,245 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:08,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:08,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-12-17 11:02:08,446 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:08,446 INFO L85 PathProgramCache]: Analyzing trace with hash -661397631, now seen corresponding path program 65 times [2021-12-17 11:02:08,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:08,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822983702] [2021-12-17 11:02:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:08,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1089 proven. 1223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:10,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:10,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822983702] [2021-12-17 11:02:10,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822983702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:02:10,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929909381] [2021-12-17 11:02:10,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 11:02:10,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:10,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:10,227 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:02:10,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-12-17 11:02:10,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-12-17 11:02:10,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:02:10,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-17 11:02:10,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:13,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:16,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929909381] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:02:16,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:02:16,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 186 [2021-12-17 11:02:16,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552561439] [2021-12-17 11:02:16,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:02:16,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2021-12-17 11:02:16,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2021-12-17 11:02:16,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6128, Invalid=28282, Unknown=0, NotChecked=0, Total=34410 [2021-12-17 11:02:16,659 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 186 states, 186 states have (on average 1.9838709677419355) internal successors, (369), 186 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:21,402 INFO L93 Difference]: Finished difference Result 393 states and 398 transitions. [2021-12-17 11:02:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-17 11:02:21,403 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 1.9838709677419355) internal successors, (369), 186 states have internal predecessors, (369), 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 151 [2021-12-17 11:02:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:21,403 INFO L225 Difference]: With dead ends: 393 [2021-12-17 11:02:21,403 INFO L226 Difference]: Without dead ends: 312 [2021-12-17 11:02:21,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21406 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=10025, Invalid=41731, Unknown=0, NotChecked=0, Total=51756 [2021-12-17 11:02:21,405 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 297 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:21,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 169 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 11:02:21,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-17 11:02:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 228. [2021-12-17 11:02:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0220264317180616) internal successors, (232), 227 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 232 transitions. [2021-12-17 11:02:21,471 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 232 transitions. Word has length 151 [2021-12-17 11:02:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:21,471 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 232 transitions. [2021-12-17 11:02:21,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 1.9838709677419355) internal successors, (369), 186 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 232 transitions. [2021-12-17 11:02:21,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 11:02:21,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:21,472 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:21,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:21,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-12-17 11:02:21,673 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:21,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:21,673 INFO L85 PathProgramCache]: Analyzing trace with hash 175788989, now seen corresponding path program 65 times [2021-12-17 11:02:21,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:21,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402065764] [2021-12-17 11:02:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:21,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1089 proven. 1223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:23,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:23,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402065764] [2021-12-17 11:02:23,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402065764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:02:23,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24473486] [2021-12-17 11:02:23,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 11:02:23,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:23,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:23,999 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:02:24,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-12-17 11:02:24,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-12-17 11:02:24,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:02:24,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-17 11:02:24,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:27,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:29,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24473486] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:02:29,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:02:29,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 185 [2021-12-17 11:02:29,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098168033] [2021-12-17 11:02:29,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:02:29,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2021-12-17 11:02:29,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:29,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2021-12-17 11:02:29,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6153, Invalid=27887, Unknown=0, NotChecked=0, Total=34040 [2021-12-17 11:02:29,810 INFO L87 Difference]: Start difference. First operand 228 states and 232 transitions. Second operand has 185 states, 185 states have (on average 1.9945945945945946) internal successors, (369), 185 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:32,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:32,371 INFO L93 Difference]: Finished difference Result 251 states and 254 transitions. [2021-12-17 11:02:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-17 11:02:32,371 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 1.9945945945945946) internal successors, (369), 185 states have internal predecessors, (369), 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 151 [2021-12-17 11:02:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:32,371 INFO L225 Difference]: With dead ends: 251 [2021-12-17 11:02:32,371 INFO L226 Difference]: Without dead ends: 245 [2021-12-17 11:02:32,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 188 SyntacticMatches, 5 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22168 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=12571, Invalid=37829, Unknown=0, NotChecked=0, Total=50400 [2021-12-17 11:02:32,373 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 564 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:32,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 156 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 11:02:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-17 11:02:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 230. [2021-12-17 11:02:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.0218340611353711) internal successors, (234), 229 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 234 transitions. [2021-12-17 11:02:32,441 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 234 transitions. Word has length 151 [2021-12-17 11:02:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:32,441 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 234 transitions. [2021-12-17 11:02:32,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 1.9945945945945946) internal successors, (369), 185 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 234 transitions. [2021-12-17 11:02:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-17 11:02:32,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:32,442 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:32,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:32,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-12-17 11:02:32,642 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:32,642 INFO L85 PathProgramCache]: Analyzing trace with hash -816408545, now seen corresponding path program 66 times [2021-12-17 11:02:32,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:32,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595385418] [2021-12-17 11:02:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:32,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1158 proven. 1223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:34,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:34,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595385418] [2021-12-17 11:02:34,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595385418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:02:34,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086842255] [2021-12-17 11:02:34,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 11:02:34,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:34,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:34,406 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:02:34,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-12-17 11:02:34,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2021-12-17 11:02:34,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:02:34,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-17 11:02:34,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:38,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:40,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086842255] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:02:40,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:02:40,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 184 [2021-12-17 11:02:40,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000605287] [2021-12-17 11:02:40,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:02:40,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2021-12-17 11:02:40,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:40,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2021-12-17 11:02:40,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6151, Invalid=27521, Unknown=0, NotChecked=0, Total=33672 [2021-12-17 11:02:40,916 INFO L87 Difference]: Start difference. First operand 230 states and 234 transitions. Second operand has 184 states, 184 states have (on average 2.005434782608696) internal successors, (369), 184 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:44,606 INFO L93 Difference]: Finished difference Result 311 states and 315 transitions. [2021-12-17 11:02:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-17 11:02:44,606 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 2.005434782608696) internal successors, (369), 184 states have internal predecessors, (369), 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 153 [2021-12-17 11:02:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:44,607 INFO L225 Difference]: With dead ends: 311 [2021-12-17 11:02:44,607 INFO L226 Difference]: Without dead ends: 230 [2021-12-17 11:02:44,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20585 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=9828, Invalid=39678, Unknown=0, NotChecked=0, Total=49506 [2021-12-17 11:02:44,609 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 207 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:44,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 163 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 11:02:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-17 11:02:44,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2021-12-17 11:02:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0175438596491229) internal successors, (232), 228 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 232 transitions. [2021-12-17 11:02:44,697 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 232 transitions. Word has length 153 [2021-12-17 11:02:44,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:44,697 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 232 transitions. [2021-12-17 11:02:44,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 2.005434782608696) internal successors, (369), 184 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:44,697 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 232 transitions. [2021-12-17 11:02:44,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-17 11:02:44,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:44,698 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:44,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:44,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:44,899 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:44,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1088785407, now seen corresponding path program 66 times [2021-12-17 11:02:44,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:44,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045642827] [2021-12-17 11:02:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:44,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1089 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:47,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:47,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045642827] [2021-12-17 11:02:47,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045642827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:02:47,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377309036] [2021-12-17 11:02:47,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 11:02:47,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:47,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:47,335 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:02:47,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-12-17 11:02:47,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2021-12-17 11:02:47,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:02:47,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-17 11:02:47,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:50,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:53,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377309036] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:02:53,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:02:53,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 184 [2021-12-17 11:02:53,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836156257] [2021-12-17 11:02:53,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:02:53,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2021-12-17 11:02:53,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:53,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2021-12-17 11:02:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6185, Invalid=27487, Unknown=0, NotChecked=0, Total=33672 [2021-12-17 11:02:53,250 INFO L87 Difference]: Start difference. First operand 229 states and 232 transitions. Second operand has 184 states, 184 states have (on average 2.016304347826087) internal successors, (371), 184 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:55,685 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2021-12-17 11:02:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-17 11:02:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 2.016304347826087) internal successors, (371), 184 states have internal predecessors, (371), 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 153 [2021-12-17 11:02:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:55,686 INFO L225 Difference]: With dead ends: 239 [2021-12-17 11:02:55,686 INFO L226 Difference]: Without dead ends: 233 [2021-12-17 11:02:55,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 194 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21711 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=12405, Invalid=36657, Unknown=0, NotChecked=0, Total=49062 [2021-12-17 11:02:55,688 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 471 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:55,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 83 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 11:02:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-17 11:02:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2021-12-17 11:02:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2021-12-17 11:02:55,758 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 153 [2021-12-17 11:02:55,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:55,759 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2021-12-17 11:02:55,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 2.016304347826087) internal successors, (371), 184 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:02:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2021-12-17 11:02:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-17 11:02:55,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:55,760 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:55,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:55,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-12-17 11:02:55,960 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1373339551, now seen corresponding path program 67 times [2021-12-17 11:02:55,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:55,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628971989] [2021-12-17 11:02:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:55,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1156 proven. 1294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:02:57,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:57,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628971989] [2021-12-17 11:02:57,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628971989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:02:57,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183500906] [2021-12-17 11:02:57,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 11:02:57,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:57,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:57,850 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:02:57,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-12-17 11:02:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:57,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-17 11:02:57,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1225 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:03:01,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1225 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:03:04,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183500906] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:03:04,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:03:04,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 191 [2021-12-17 11:03:04,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876057118] [2021-12-17 11:03:04,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:04,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2021-12-17 11:03:04,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2021-12-17 11:03:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6464, Invalid=29826, Unknown=0, NotChecked=0, Total=36290 [2021-12-17 11:03:04,797 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 191 states, 191 states have (on average 1.9842931937172774) internal successors, (379), 191 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:03:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:10,668 INFO L93 Difference]: Finished difference Result 403 states and 408 transitions. [2021-12-17 11:03:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-17 11:03:10,669 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.9842931937172774) internal successors, (379), 191 states have internal predecessors, (379), 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 155 [2021-12-17 11:03:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:10,669 INFO L225 Difference]: With dead ends: 403 [2021-12-17 11:03:10,669 INFO L226 Difference]: Without dead ends: 320 [2021-12-17 11:03:10,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22575 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=10560, Invalid=43962, Unknown=0, NotChecked=0, Total=54522 [2021-12-17 11:03:10,672 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 342 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:10,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 159 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 11:03:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-17 11:03:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 234. [2021-12-17 11:03:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0214592274678111) internal successors, (238), 233 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:03:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2021-12-17 11:03:10,741 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 155 [2021-12-17 11:03:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:10,741 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2021-12-17 11:03:10,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.9842931937172774) internal successors, (379), 191 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:03:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2021-12-17 11:03:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-17 11:03:10,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:10,742 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:10,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-12-17 11:03:10,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:10,942 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:10,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1777278237, now seen corresponding path program 67 times [2021-12-17 11:03:10,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:10,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100594126] [2021-12-17 11:03:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:10,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1156 proven. 1294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:03:13,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:13,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100594126] [2021-12-17 11:03:13,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100594126] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:03:13,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582203650] [2021-12-17 11:03:13,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 11:03:13,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:13,498 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:13,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-12-17 11:03:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-17 11:03:13,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1225 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:03:17,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1225 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:03:19,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582203650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:03:19,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 11:03:19,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 190 [2021-12-17 11:03:19,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107248900] [2021-12-17 11:03:19,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:19,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-12-17 11:03:19,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:19,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-12-17 11:03:19,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6490, Invalid=29420, Unknown=0, NotChecked=0, Total=35910 [2021-12-17 11:03:19,719 INFO L87 Difference]: Start difference. First operand 234 states and 238 transitions. Second operand has 190 states, 190 states have (on average 1.9947368421052631) internal successors, (379), 190 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:03:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:22,565 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2021-12-17 11:03:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-17 11:03:22,566 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 1.9947368421052631) internal successors, (379), 190 states have internal predecessors, (379), 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 155 [2021-12-17 11:03:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:22,566 INFO L225 Difference]: With dead ends: 257 [2021-12-17 11:03:22,566 INFO L226 Difference]: Without dead ends: 251 [2021-12-17 11:03:22,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 193 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23395 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=13252, Invalid=39878, Unknown=0, NotChecked=0, Total=53130 [2021-12-17 11:03:22,568 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 533 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:22,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 136 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 11:03:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-17 11:03:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 236. [2021-12-17 11:03:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0212765957446808) internal successors, (240), 235 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:03:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 240 transitions. [2021-12-17 11:03:22,649 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 240 transitions. Word has length 155 [2021-12-17 11:03:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:22,649 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 240 transitions. [2021-12-17 11:03:22,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 1.9947368421052631) internal successors, (379), 190 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:03:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 240 transitions. [2021-12-17 11:03:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 11:03:22,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:22,650 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:22,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-12-17 11:03:22,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:22,851 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:22,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:22,851 INFO L85 PathProgramCache]: Analyzing trace with hash 616466815, now seen corresponding path program 68 times [2021-12-17 11:03:22,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:22,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082037750] [2021-12-17 11:03:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:22,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15