./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label29.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/eca-rers2012/Problem13_label29.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 8f598b1db7f2b2cd1017a328f20419506fd47df23c7e336ea67891b462314c30 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:43:59,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:43:59,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:43:59,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:43:59,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:43:59,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:43:59,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:43:59,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:43:59,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:43:59,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:43:59,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:43:59,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:43:59,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:43:59,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:43:59,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:43:59,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:43:59,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:43:59,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:43:59,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:43:59,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:43:59,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:43:59,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:43:59,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:43:59,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:43:59,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:43:59,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:43:59,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:43:59,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:43:59,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:43:59,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:43:59,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:43:59,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:43:59,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:43:59,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:43:59,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:43:59,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:43:59,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:43:59,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:43:59,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:43:59,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:43:59,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:43:59,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:43:59,310 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:43:59,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:43:59,311 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:43:59,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:43:59,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:43:59,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:43:59,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:43:59,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:43:59,313 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:43:59,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:43:59,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:43:59,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:43:59,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:43:59,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:43:59,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:43:59,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:43:59,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:43:59,314 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:43:59,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:43:59,315 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:43:59,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:43:59,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:43:59,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:43:59,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:43:59,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:43:59,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:43:59,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:43:59,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:43:59,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:43:59,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:43:59,316 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:43:59,316 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:43:59,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:43:59,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:43:59,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f598b1db7f2b2cd1017a328f20419506fd47df23c7e336ea67891b462314c30 [2021-12-15 09:43:59,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:43:59,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:43:59,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:43:59,505 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:43:59,506 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:43:59,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label29.c [2021-12-15 09:43:59,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5ee11a2/a64d51038dd4493eb6dc028ee0e33a8f/FLAGaaf2b8149 [2021-12-15 09:44:00,041 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:44:00,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label29.c [2021-12-15 09:44:00,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5ee11a2/a64d51038dd4493eb6dc028ee0e33a8f/FLAGaaf2b8149 [2021-12-15 09:44:00,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5ee11a2/a64d51038dd4493eb6dc028ee0e33a8f [2021-12-15 09:44:00,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:44:00,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:44:00,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:44:00,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:44:00,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:44:00,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:44:00" (1/1) ... [2021-12-15 09:44:00,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16064e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:00, skipping insertion in model container [2021-12-15 09:44:00,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:44:00" (1/1) ... [2021-12-15 09:44:00,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:44:00,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:44:00,596 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/eca-rers2012/Problem13_label29.c[2333,2346] [2021-12-15 09:44:01,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:44:01,240 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:44:01,264 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/eca-rers2012/Problem13_label29.c[2333,2346] [2021-12-15 09:44:01,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:44:01,651 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:44:01,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01 WrapperNode [2021-12-15 09:44:01,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:44:01,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:44:01,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:44:01,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:44:01,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (1/1) ... [2021-12-15 09:44:01,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (1/1) ... [2021-12-15 09:44:02,187 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 09:44:02,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:44:02,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:44:02,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:44:02,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:44:02,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (1/1) ... [2021-12-15 09:44:02,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (1/1) ... [2021-12-15 09:44:02,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (1/1) ... [2021-12-15 09:44:02,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (1/1) ... [2021-12-15 09:44:02,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (1/1) ... [2021-12-15 09:44:02,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (1/1) ... [2021-12-15 09:44:02,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (1/1) ... [2021-12-15 09:44:02,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:44:02,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:44:02,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:44:02,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:44:02,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (1/1) ... [2021-12-15 09:44:02,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:44:02,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:44:02,688 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) [2021-12-15 09:44:02,747 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 [2021-12-15 09:44:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:44:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:44:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:44:02,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:44:02,857 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:44:02,858 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:44:06,176 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:44:06,192 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:44:06,194 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:44:06,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:44:06 BoogieIcfgContainer [2021-12-15 09:44:06,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:44:06,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:44:06,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:44:06,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:44:06,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:44:00" (1/3) ... [2021-12-15 09:44:06,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5098efd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:44:06, skipping insertion in model container [2021-12-15 09:44:06,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:01" (2/3) ... [2021-12-15 09:44:06,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5098efd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:44:06, skipping insertion in model container [2021-12-15 09:44:06,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:44:06" (3/3) ... [2021-12-15 09:44:06,204 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label29.c [2021-12-15 09:44:06,207 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:44:06,207 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:44:06,244 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:44:06,248 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 [2021-12-15 09:44:06,248 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:44:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 09:44:06,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:06,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:06,274 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:06,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1414013846, now seen corresponding path program 1 times [2021-12-15 09:44:06,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:06,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739473385] [2021-12-15 09:44:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:06,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:06,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:06,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739473385] [2021-12-15 09:44:06,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739473385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:06,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:06,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:06,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407804776] [2021-12-15 09:44:06,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:06,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:06,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:06,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:06,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:06,418 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:10,077 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-15 09:44:10,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:10,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 09:44:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:10,119 INFO L225 Difference]: With dead ends: 3121 [2021-12-15 09:44:10,119 INFO L226 Difference]: Without dead ends: 1944 [2021-12-15 09:44:10,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:10,126 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 975 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:10,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-15 09:44:10,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-15 09:44:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-15 09:44:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-15 09:44:10,240 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 14 [2021-12-15 09:44:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:10,241 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-15 09:44:10,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-15 09:44:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 09:44:10,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:10,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:10,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:44:10,243 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:10,244 INFO L85 PathProgramCache]: Analyzing trace with hash 107877298, now seen corresponding path program 1 times [2021-12-15 09:44:10,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:10,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995824921] [2021-12-15 09:44:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:10,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:10,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:10,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995824921] [2021-12-15 09:44:10,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995824921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:10,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:10,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:10,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069537048] [2021-12-15 09:44:10,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:10,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:44:10,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:10,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:44:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:10,390 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 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) [2021-12-15 09:44:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:14,914 INFO L93 Difference]: Finished difference Result 6152 states and 10700 transitions. [2021-12-15 09:44:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:44:14,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 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 79 [2021-12-15 09:44:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:14,929 INFO L225 Difference]: With dead ends: 6152 [2021-12-15 09:44:14,929 INFO L226 Difference]: Without dead ends: 4281 [2021-12-15 09:44:14,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:44:14,936 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 2628 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2628 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:14,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2628 Valid, 1017 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-15 09:44:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-15 09:44:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4280. [2021-12-15 09:44:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 1.4774480018695957) internal successors, (6322), 4279 states have internal predecessors, (6322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6322 transitions. [2021-12-15 09:44:15,004 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6322 transitions. Word has length 79 [2021-12-15 09:44:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:15,005 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 6322 transitions. [2021-12-15 09:44:15,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 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) [2021-12-15 09:44:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6322 transitions. [2021-12-15 09:44:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 09:44:15,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:15,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:15,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:44:15,013 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:15,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1729689141, now seen corresponding path program 1 times [2021-12-15 09:44:15,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:15,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447486500] [2021-12-15 09:44:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:15,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 09:44:15,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:15,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447486500] [2021-12-15 09:44:15,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447486500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:15,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:15,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:15,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507196280] [2021-12-15 09:44:15,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:15,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:15,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:15,146 INFO L87 Difference]: Start difference. First operand 4280 states and 6322 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 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) [2021-12-15 09:44:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:18,279 INFO L93 Difference]: Finished difference Result 10966 states and 16976 transitions. [2021-12-15 09:44:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:18,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-15 09:44:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:18,299 INFO L225 Difference]: With dead ends: 10966 [2021-12-15 09:44:18,299 INFO L226 Difference]: Without dead ends: 7475 [2021-12-15 09:44:18,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:18,304 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 866 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 3543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:18,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 830 Invalid, 3543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 3017 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:44:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7475 states. [2021-12-15 09:44:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7475 to 7470. [2021-12-15 09:44:18,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7470 states, 7469 states have (on average 1.469272995046191) internal successors, (10974), 7469 states have internal predecessors, (10974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7470 states to 7470 states and 10974 transitions. [2021-12-15 09:44:18,411 INFO L78 Accepts]: Start accepts. Automaton has 7470 states and 10974 transitions. Word has length 110 [2021-12-15 09:44:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:18,412 INFO L470 AbstractCegarLoop]: Abstraction has 7470 states and 10974 transitions. [2021-12-15 09:44:18,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 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) [2021-12-15 09:44:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7470 states and 10974 transitions. [2021-12-15 09:44:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-15 09:44:18,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:18,422 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:18,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:44:18,422 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:18,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:18,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1324350996, now seen corresponding path program 1 times [2021-12-15 09:44:18,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:18,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949203596] [2021-12-15 09:44:18,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:18,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:18,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:18,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949203596] [2021-12-15 09:44:18,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949203596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:18,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:18,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:18,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335741179] [2021-12-15 09:44:18,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:18,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:18,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:18,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:18,513 INFO L87 Difference]: Start difference. First operand 7470 states and 10974 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:21,282 INFO L93 Difference]: Finished difference Result 20467 states and 30850 transitions. [2021-12-15 09:44:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:21,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2021-12-15 09:44:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:21,328 INFO L225 Difference]: With dead ends: 20467 [2021-12-15 09:44:21,328 INFO L226 Difference]: Without dead ends: 13786 [2021-12-15 09:44:21,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:21,346 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 901 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 929 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:21,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 915 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [929 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:44:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13786 states. [2021-12-15 09:44:21,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13786 to 13777. [2021-12-15 09:44:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.3683217189314751) internal successors, (18850), 13776 states have internal predecessors, (18850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 18850 transitions. [2021-12-15 09:44:21,595 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 18850 transitions. Word has length 177 [2021-12-15 09:44:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:21,596 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 18850 transitions. [2021-12-15 09:44:21,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 18850 transitions. [2021-12-15 09:44:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-15 09:44:21,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:21,599 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:21,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:44:21,599 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1802001797, now seen corresponding path program 1 times [2021-12-15 09:44:21,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:21,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820347002] [2021-12-15 09:44:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:21,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 09:44:21,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:21,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820347002] [2021-12-15 09:44:21,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820347002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:21,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:21,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:21,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243617506] [2021-12-15 09:44:21,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:21,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:21,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:21,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:21,720 INFO L87 Difference]: Start difference. First operand 13777 states and 18850 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 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) [2021-12-15 09:44:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:24,631 INFO L93 Difference]: Finished difference Result 38608 states and 53602 transitions. [2021-12-15 09:44:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:24,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 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) Word has length 196 [2021-12-15 09:44:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:24,678 INFO L225 Difference]: With dead ends: 38608 [2021-12-15 09:44:24,679 INFO L226 Difference]: Without dead ends: 25620 [2021-12-15 09:44:24,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:24,695 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 946 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:24,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 836 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:44:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25620 states. [2021-12-15 09:44:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25620 to 25609. [2021-12-15 09:44:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25609 states, 25608 states have (on average 1.2739378319275227) internal successors, (32623), 25608 states have internal predecessors, (32623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25609 states to 25609 states and 32623 transitions. [2021-12-15 09:44:24,970 INFO L78 Accepts]: Start accepts. Automaton has 25609 states and 32623 transitions. Word has length 196 [2021-12-15 09:44:24,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:24,971 INFO L470 AbstractCegarLoop]: Abstraction has 25609 states and 32623 transitions. [2021-12-15 09:44:24,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 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) [2021-12-15 09:44:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 25609 states and 32623 transitions. [2021-12-15 09:44:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-15 09:44:24,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:24,975 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:24,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:44:24,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash -978584057, now seen corresponding path program 1 times [2021-12-15 09:44:24,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:24,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149556571] [2021-12-15 09:44:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:24,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 09:44:25,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:25,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149556571] [2021-12-15 09:44:25,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149556571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:25,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:25,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:25,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003956852] [2021-12-15 09:44:25,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:25,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:25,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:25,100 INFO L87 Difference]: Start difference. First operand 25609 states and 32623 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 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) [2021-12-15 09:44:27,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:27,949 INFO L93 Difference]: Finished difference Result 72457 states and 93045 transitions. [2021-12-15 09:44:27,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:27,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 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 204 [2021-12-15 09:44:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:28,013 INFO L225 Difference]: With dead ends: 72457 [2021-12-15 09:44:28,013 INFO L226 Difference]: Without dead ends: 47637 [2021-12-15 09:44:28,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:28,042 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:28,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 986 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:44:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47637 states. [2021-12-15 09:44:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47637 to 43696. [2021-12-15 09:44:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43696 states, 43695 states have (on average 1.2124041652362971) internal successors, (52976), 43695 states have internal predecessors, (52976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43696 states to 43696 states and 52976 transitions. [2021-12-15 09:44:28,444 INFO L78 Accepts]: Start accepts. Automaton has 43696 states and 52976 transitions. Word has length 204 [2021-12-15 09:44:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:28,445 INFO L470 AbstractCegarLoop]: Abstraction has 43696 states and 52976 transitions. [2021-12-15 09:44:28,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 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) [2021-12-15 09:44:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 43696 states and 52976 transitions. [2021-12-15 09:44:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-15 09:44:28,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:28,447 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:28,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:44:28,447 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1421142965, now seen corresponding path program 1 times [2021-12-15 09:44:28,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232418592] [2021-12-15 09:44:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:28,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:28,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:28,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232418592] [2021-12-15 09:44:28,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232418592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:28,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:28,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:28,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351005776] [2021-12-15 09:44:28,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:28,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:28,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:28,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:28,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:28,518 INFO L87 Difference]: Start difference. First operand 43696 states and 52976 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 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) [2021-12-15 09:44:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:31,208 INFO L93 Difference]: Finished difference Result 89734 states and 108406 transitions. [2021-12-15 09:44:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:31,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 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) Word has length 228 [2021-12-15 09:44:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:31,273 INFO L225 Difference]: With dead ends: 89734 [2021-12-15 09:44:31,273 INFO L226 Difference]: Without dead ends: 46827 [2021-12-15 09:44:31,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:31,308 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 1034 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:31,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 1647 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:44:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46827 states. [2021-12-15 09:44:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46827 to 44455. [2021-12-15 09:44:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44455 states, 44454 states have (on average 1.142596841679039) internal successors, (50793), 44454 states have internal predecessors, (50793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44455 states to 44455 states and 50793 transitions. [2021-12-15 09:44:31,744 INFO L78 Accepts]: Start accepts. Automaton has 44455 states and 50793 transitions. Word has length 228 [2021-12-15 09:44:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:31,745 INFO L470 AbstractCegarLoop]: Abstraction has 44455 states and 50793 transitions. [2021-12-15 09:44:31,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 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) [2021-12-15 09:44:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 44455 states and 50793 transitions. [2021-12-15 09:44:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-12-15 09:44:31,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:31,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:31,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:44:31,749 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:31,749 INFO L85 PathProgramCache]: Analyzing trace with hash -187004170, now seen corresponding path program 1 times [2021-12-15 09:44:31,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:31,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913618716] [2021-12-15 09:44:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:31,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-15 09:44:31,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:31,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913618716] [2021-12-15 09:44:31,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913618716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:31,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:31,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:31,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569863648] [2021-12-15 09:44:31,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:31,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:31,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:31,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:31,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:31,856 INFO L87 Difference]: Start difference. First operand 44455 states and 50793 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:34,967 INFO L93 Difference]: Finished difference Result 107017 states and 123493 transitions. [2021-12-15 09:44:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:34,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 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 305 [2021-12-15 09:44:34,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:35,050 INFO L225 Difference]: With dead ends: 107017 [2021-12-15 09:44:35,050 INFO L226 Difference]: Without dead ends: 63351 [2021-12-15 09:44:35,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:35,084 INFO L933 BasicCegarLoop]: 1777 mSDtfsCounter, 854 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:35,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 1919 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:44:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63351 states. [2021-12-15 09:44:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63351 to 62560. [2021-12-15 09:44:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62560 states, 62559 states have (on average 1.1157467350820824) internal successors, (69800), 62559 states have internal predecessors, (69800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62560 states to 62560 states and 69800 transitions. [2021-12-15 09:44:35,831 INFO L78 Accepts]: Start accepts. Automaton has 62560 states and 69800 transitions. Word has length 305 [2021-12-15 09:44:35,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:35,832 INFO L470 AbstractCegarLoop]: Abstraction has 62560 states and 69800 transitions. [2021-12-15 09:44:35,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 62560 states and 69800 transitions. [2021-12-15 09:44:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-12-15 09:44:35,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:35,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:35,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:44:35,837 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:35,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1880811599, now seen corresponding path program 1 times [2021-12-15 09:44:35,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:35,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883512446] [2021-12-15 09:44:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:35,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 09:44:35,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:35,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883512446] [2021-12-15 09:44:35,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883512446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:35,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:35,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:35,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179693140] [2021-12-15 09:44:35,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:35,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:35,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:35,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:35,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:35,933 INFO L87 Difference]: Start difference. First operand 62560 states and 69800 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:38,971 INFO L93 Difference]: Finished difference Result 143250 states and 159644 transitions. [2021-12-15 09:44:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:38,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 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 315 [2021-12-15 09:44:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:39,059 INFO L225 Difference]: With dead ends: 143250 [2021-12-15 09:44:39,059 INFO L226 Difference]: Without dead ends: 79901 [2021-12-15 09:44:39,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:39,083 INFO L933 BasicCegarLoop]: 1746 mSDtfsCounter, 761 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 2840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:39,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 1885 Invalid, 2840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:44:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79901 states. [2021-12-15 09:44:39,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79901 to 78298. [2021-12-15 09:44:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78298 states, 78297 states have (on average 1.1051125841347689) internal successors, (86527), 78297 states have internal predecessors, (86527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78298 states to 78298 states and 86527 transitions. [2021-12-15 09:44:39,814 INFO L78 Accepts]: Start accepts. Automaton has 78298 states and 86527 transitions. Word has length 315 [2021-12-15 09:44:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:39,814 INFO L470 AbstractCegarLoop]: Abstraction has 78298 states and 86527 transitions. [2021-12-15 09:44:39,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 78298 states and 86527 transitions. [2021-12-15 09:44:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-12-15 09:44:39,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:39,818 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:39,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:44:39,818 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:39,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:39,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1427385796, now seen corresponding path program 1 times [2021-12-15 09:44:39,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:39,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351713596] [2021-12-15 09:44:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:39,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-15 09:44:39,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:39,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351713596] [2021-12-15 09:44:39,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351713596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:39,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:39,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:39,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662523621] [2021-12-15 09:44:39,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:39,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:39,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:39,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:39,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:39,916 INFO L87 Difference]: Start difference. First operand 78298 states and 86527 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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) [2021-12-15 09:44:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:43,107 INFO L93 Difference]: Finished difference Result 155805 states and 172259 transitions. [2021-12-15 09:44:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:43,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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) Word has length 339 [2021-12-15 09:44:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:43,196 INFO L225 Difference]: With dead ends: 155805 [2021-12-15 09:44:43,196 INFO L226 Difference]: Without dead ends: 78296 [2021-12-15 09:44:43,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:43,240 INFO L933 BasicCegarLoop]: 1340 mSDtfsCounter, 1188 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:43,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 1418 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:44:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78296 states. [2021-12-15 09:44:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78296 to 77504. [2021-12-15 09:44:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77504 states, 77503 states have (on average 1.0814549114227836) internal successors, (83816), 77503 states have internal predecessors, (83816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77504 states to 77504 states and 83816 transitions. [2021-12-15 09:44:44,215 INFO L78 Accepts]: Start accepts. Automaton has 77504 states and 83816 transitions. Word has length 339 [2021-12-15 09:44:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:44,216 INFO L470 AbstractCegarLoop]: Abstraction has 77504 states and 83816 transitions. [2021-12-15 09:44:44,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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) [2021-12-15 09:44:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 77504 states and 83816 transitions. [2021-12-15 09:44:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-12-15 09:44:44,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:44,243 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:44,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:44:44,244 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1320971521, now seen corresponding path program 1 times [2021-12-15 09:44:44,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:44,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665260345] [2021-12-15 09:44:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:44,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-15 09:44:44,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:44,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665260345] [2021-12-15 09:44:44,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665260345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:44,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:44,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:44,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132987336] [2021-12-15 09:44:44,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:44,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:44:44,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:44,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:44:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:44,343 INFO L87 Difference]: Start difference. First operand 77504 states and 83816 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:50,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:50,542 INFO L93 Difference]: Finished difference Result 216600 states and 234987 transitions. [2021-12-15 09:44:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:44:50,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 362 [2021-12-15 09:44:50,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:50,694 INFO L225 Difference]: With dead ends: 216600 [2021-12-15 09:44:50,694 INFO L226 Difference]: Without dead ends: 139885 [2021-12-15 09:44:50,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:50,726 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 1706 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 6604 mSolverCounterSat, 1029 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 7633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1029 IncrementalHoareTripleChecker+Valid, 6604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:50,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 782 Invalid, 7633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1029 Valid, 6604 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 09:44:50,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139885 states. [2021-12-15 09:44:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139885 to 137391. [2021-12-15 09:44:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137391 states, 137390 states have (on average 1.0782298566125628) internal successors, (148138), 137390 states have internal predecessors, (148138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137391 states to 137391 states and 148138 transitions. [2021-12-15 09:44:52,222 INFO L78 Accepts]: Start accepts. Automaton has 137391 states and 148138 transitions. Word has length 362 [2021-12-15 09:44:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:52,223 INFO L470 AbstractCegarLoop]: Abstraction has 137391 states and 148138 transitions. [2021-12-15 09:44:52,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 137391 states and 148138 transitions. [2021-12-15 09:44:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-12-15 09:44:52,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:52,228 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:52,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:44:52,228 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:52,229 INFO L85 PathProgramCache]: Analyzing trace with hash -242010139, now seen corresponding path program 1 times [2021-12-15 09:44:52,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:52,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831149755] [2021-12-15 09:44:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:52,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 09:44:52,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:52,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831149755] [2021-12-15 09:44:52,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831149755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:52,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:52,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:52,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201948576] [2021-12-15 09:44:52,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:52,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:52,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:52,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:52,521 INFO L87 Difference]: Start difference. First operand 137391 states and 148138 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:55,649 INFO L93 Difference]: Finished difference Result 275593 states and 297108 transitions. [2021-12-15 09:44:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 395 [2021-12-15 09:44:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:55,801 INFO L225 Difference]: With dead ends: 275593 [2021-12-15 09:44:55,801 INFO L226 Difference]: Without dead ends: 138991 [2021-12-15 09:44:55,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:55,841 INFO L933 BasicCegarLoop]: 985 mSDtfsCounter, 795 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:55,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 1125 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:44:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138991 states. [2021-12-15 09:44:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138991 to 136605. [2021-12-15 09:44:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136605 states, 136604 states have (on average 1.0711326169072648) internal successors, (146321), 136604 states have internal predecessors, (146321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136605 states to 136605 states and 146321 transitions. [2021-12-15 09:44:57,282 INFO L78 Accepts]: Start accepts. Automaton has 136605 states and 146321 transitions. Word has length 395 [2021-12-15 09:44:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:57,282 INFO L470 AbstractCegarLoop]: Abstraction has 136605 states and 146321 transitions. [2021-12-15 09:44:57,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 136605 states and 146321 transitions. [2021-12-15 09:44:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-12-15 09:44:57,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:57,288 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:57,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:44:57,289 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash 308905835, now seen corresponding path program 1 times [2021-12-15 09:44:57,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:57,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005887846] [2021-12-15 09:44:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:57,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 324 proven. 110 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-15 09:44:57,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:57,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005887846] [2021-12-15 09:44:57,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005887846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:44:57,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347174536] [2021-12-15 09:44:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:57,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:44:57,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:44:57,728 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) [2021-12-15 09:44:57,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:44:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:57,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:44:57,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:44:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 321 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-15 09:44:58,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:44:58,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347174536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:58,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:44:58,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:44:58,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283758164] [2021-12-15 09:44:58,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:58,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:58,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:44:58,924 INFO L87 Difference]: Start difference. First operand 136605 states and 146321 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)