./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label01.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 500fb51493d30e1b316117b24f5b2ae67d8f35b2c1172c5ed38f45dce818927e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:44:01,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:44:01,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:44:01,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:44:01,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:44:01,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:44:01,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:44:01,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:44:01,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:44:01,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:44:01,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:44:01,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:44:01,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:44:01,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:44:01,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:44:01,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:44:01,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:44:01,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:44:01,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:44:01,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:44:01,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:44:01,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:44:01,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:44:01,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:44:01,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:44:01,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:44:01,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:44:01,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:44:01,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:44:01,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:44:01,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:44:01,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:44:01,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:44:01,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:44:01,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:44:01,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:44:01,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:44:01,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:44:01,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:44:01,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:44:01,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:44:01,209 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:44:01,226 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:44:01,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:44:01,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:44:01,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:44:01,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:44:01,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:44:01,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:44:01,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:44:01,234 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:44:01,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:44:01,235 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:44:01,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:44:01,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:44:01,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:44:01,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:44:01,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:44:01,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:44:01,236 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:44:01,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:44:01,236 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:44:01,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:44:01,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:44:01,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:44:01,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:44:01,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:44:01,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:44:01,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:44:01,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:44:01,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:44:01,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:44:01,238 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:44:01,238 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:44:01,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:44:01,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:44:01,239 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 500fb51493d30e1b316117b24f5b2ae67d8f35b2c1172c5ed38f45dce818927e [2021-12-15 22:44:01,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:44:01,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:44:01,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:44:01,449 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:44:01,450 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:44:01,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label01.c [2021-12-15 22:44:01,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53580b397/fc470c1329794c59b29e849dc306eccf/FLAG14a781089 [2021-12-15 22:44:02,105 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:44:02,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label01.c [2021-12-15 22:44:02,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53580b397/fc470c1329794c59b29e849dc306eccf/FLAG14a781089 [2021-12-15 22:44:02,525 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53580b397/fc470c1329794c59b29e849dc306eccf [2021-12-15 22:44:02,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:44:02,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:44:02,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:44:02,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:44:02,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:44:02,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:44:02" (1/1) ... [2021-12-15 22:44:02,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3195de1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:02, skipping insertion in model container [2021-12-15 22:44:02,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:44:02" (1/1) ... [2021-12-15 22:44:02,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:44:02,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:44:02,839 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_label01.c[7003,7016] [2021-12-15 22:44:03,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:44:03,459 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:44:03,483 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_label01.c[7003,7016] [2021-12-15 22:44:03,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:44:03,833 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:44:03,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03 WrapperNode [2021-12-15 22:44:03,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:44:03,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:44:03,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:44:03,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:44:03,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (1/1) ... [2021-12-15 22:44:03,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (1/1) ... [2021-12-15 22:44:04,355 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 22:44:04,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:44:04,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:44:04,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:44:04,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:44:04,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (1/1) ... [2021-12-15 22:44:04,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (1/1) ... [2021-12-15 22:44:04,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (1/1) ... [2021-12-15 22:44:04,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (1/1) ... [2021-12-15 22:44:04,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (1/1) ... [2021-12-15 22:44:04,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (1/1) ... [2021-12-15 22:44:04,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (1/1) ... [2021-12-15 22:44:04,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:44:04,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:44:04,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:44:04,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:44:04,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (1/1) ... [2021-12-15 22:44:04,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:44:04,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:44:04,821 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 22:44:04,836 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 22:44:04,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:44:04,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:44:04,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:44:04,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:44:04,896 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:44:04,897 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:44:08,453 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:44:08,465 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:44:08,466 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:44:08,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:44:08 BoogieIcfgContainer [2021-12-15 22:44:08,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:44:08,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:44:08,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:44:08,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:44:08,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:44:02" (1/3) ... [2021-12-15 22:44:08,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67977851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:44:08, skipping insertion in model container [2021-12-15 22:44:08,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:03" (2/3) ... [2021-12-15 22:44:08,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67977851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:44:08, skipping insertion in model container [2021-12-15 22:44:08,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:44:08" (3/3) ... [2021-12-15 22:44:08,475 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label01.c [2021-12-15 22:44:08,478 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:44:08,478 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:44:08,514 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:44:08,519 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 22:44:08,519 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:44:08,556 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 22:44:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 22:44:08,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:08,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:08,563 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:08,567 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2021-12-15 22:44:08,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:08,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362915433] [2021-12-15 22:44:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:08,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:08,860 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 22:44:08,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:08,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362915433] [2021-12-15 22:44:08,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362915433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:08,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:08,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:08,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539668096] [2021-12-15 22:44:08,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:08,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:44:08,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:44:08,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:44:08,894 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 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:14,669 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-12-15 22:44:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:44:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-15 22:44:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:14,696 INFO L225 Difference]: With dead ends: 3829 [2021-12-15 22:44:14,697 INFO L226 Difference]: Without dead ends: 2664 [2021-12-15 22:44:14,705 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 22:44:14,709 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2692 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2692 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:14,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2692 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 22:44:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-12-15 22:44:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-12-15 22:44:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states 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 22:44:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-12-15 22:44:14,831 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 49 [2021-12-15 22:44:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:14,832 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-12-15 22:44:14,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-12-15 22:44:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-15 22:44:14,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:14,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:14,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:44:14,840 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:14,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:14,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1459044689, now seen corresponding path program 1 times [2021-12-15 22:44:14,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:14,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131436749] [2021-12-15 22:44:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:14,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:44:14,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:14,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131436749] [2021-12-15 22:44:14,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131436749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:14,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:14,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:14,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898234204] [2021-12-15 22:44:14,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:14,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:44:14,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:14,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:44:14,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:44:14,987 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:20,566 INFO L93 Difference]: Finished difference Result 7864 states and 12669 transitions. [2021-12-15 22:44:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:44:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-12-15 22:44:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:20,589 INFO L225 Difference]: With dead ends: 7864 [2021-12-15 22:44:20,589 INFO L226 Difference]: Without dead ends: 5990 [2021-12-15 22:44:20,593 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 22:44:20,594 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 1630 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 6333 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1630 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 6333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:20,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1630 Valid, 1191 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 6333 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-15 22:44:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2021-12-15 22:44:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5859. [2021-12-15 22:44:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.4452031410037556) internal successors, (8466), 5858 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states 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 22:44:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 8466 transitions. [2021-12-15 22:44:20,688 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 8466 transitions. Word has length 174 [2021-12-15 22:44:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:20,689 INFO L470 AbstractCegarLoop]: Abstraction has 5859 states and 8466 transitions. [2021-12-15 22:44:20,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 8466 transitions. [2021-12-15 22:44:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-15 22:44:20,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:20,692 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-15 22:44:20,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:44:20,692 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:20,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash -349709693, now seen corresponding path program 1 times [2021-12-15 22:44:20,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:20,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543624461] [2021-12-15 22:44:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:20,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:44:20,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:20,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543624461] [2021-12-15 22:44:20,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543624461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:20,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:20,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:44:20,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277000713] [2021-12-15 22:44:20,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:20,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:20,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:20,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:20,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:20,857 INFO L87 Difference]: Start difference. First operand 5859 states and 8466 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 22:44:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:24,009 INFO L93 Difference]: Finished difference Result 15685 states and 23389 transitions. [2021-12-15 22:44:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:24,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 216 [2021-12-15 22:44:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:24,048 INFO L225 Difference]: With dead ends: 15685 [2021-12-15 22:44:24,048 INFO L226 Difference]: Without dead ends: 10615 [2021-12-15 22:44:24,057 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 22:44:24,058 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 918 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:24,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 916 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:44:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2021-12-15 22:44:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10608. [2021-12-15 22:44:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3551428302064674) internal successors, (14374), 10607 states have internal predecessors, (14374), 0 states have call successors, (0), 0 states 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 22:44:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14374 transitions. [2021-12-15 22:44:24,252 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14374 transitions. Word has length 216 [2021-12-15 22:44:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:24,254 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 14374 transitions. [2021-12-15 22:44:24,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 22:44:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14374 transitions. [2021-12-15 22:44:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-15 22:44:24,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:24,261 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:44:24,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:44:24,262 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:24,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:24,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1730877210, now seen corresponding path program 1 times [2021-12-15 22:44:24,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:24,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314992922] [2021-12-15 22:44:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:24,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 22:44:24,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:24,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314992922] [2021-12-15 22:44:24,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314992922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:24,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:24,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:44:24,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118518127] [2021-12-15 22:44:24,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:24,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:24,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:24,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:24,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:24,396 INFO L87 Difference]: Start difference. First operand 10608 states and 14374 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 22:44:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:27,303 INFO L93 Difference]: Finished difference Result 29087 states and 40052 transitions. [2021-12-15 22:44:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 230 [2021-12-15 22:44:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:27,355 INFO L225 Difference]: With dead ends: 29087 [2021-12-15 22:44:27,355 INFO L226 Difference]: Without dead ends: 19268 [2021-12-15 22:44:27,368 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 22:44:27,369 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 886 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:27,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 987 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 22:44:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19268 states. [2021-12-15 22:44:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19268 to 17691. [2021-12-15 22:44:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17691 states, 17690 states have (on average 1.2688524590163934) internal successors, (22446), 17690 states have internal predecessors, (22446), 0 states have call successors, (0), 0 states 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 22:44:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17691 states to 17691 states and 22446 transitions. [2021-12-15 22:44:27,727 INFO L78 Accepts]: Start accepts. Automaton has 17691 states and 22446 transitions. Word has length 230 [2021-12-15 22:44:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:27,728 INFO L470 AbstractCegarLoop]: Abstraction has 17691 states and 22446 transitions. [2021-12-15 22:44:27,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 22:44:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 17691 states and 22446 transitions. [2021-12-15 22:44:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-15 22:44:27,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:27,731 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:44:27,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:44:27,732 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:27,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:27,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1696055251, now seen corresponding path program 1 times [2021-12-15 22:44:27,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:27,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918358515] [2021-12-15 22:44:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:27,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:44:27,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:27,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918358515] [2021-12-15 22:44:27,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918358515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:27,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:27,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:27,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030564411] [2021-12-15 22:44:27,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:27,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:27,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:27,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:27,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:27,826 INFO L87 Difference]: Start difference. First operand 17691 states and 22446 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 22:44:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:31,139 INFO L93 Difference]: Finished difference Result 51136 states and 65282 transitions. [2021-12-15 22:44:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:31,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 248 [2021-12-15 22:44:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:31,203 INFO L225 Difference]: With dead ends: 51136 [2021-12-15 22:44:31,203 INFO L226 Difference]: Without dead ends: 34234 [2021-12-15 22:44:31,226 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 22:44:31,231 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 859 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:31,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 907 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:44:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34234 states. [2021-12-15 22:44:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34234 to 34224. [2021-12-15 22:44:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34224 states, 34223 states have (on average 1.2045115857756479) internal successors, (41222), 34223 states have internal predecessors, (41222), 0 states have call successors, (0), 0 states 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 22:44:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34224 states to 34224 states and 41222 transitions. [2021-12-15 22:44:31,640 INFO L78 Accepts]: Start accepts. Automaton has 34224 states and 41222 transitions. Word has length 248 [2021-12-15 22:44:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:31,641 INFO L470 AbstractCegarLoop]: Abstraction has 34224 states and 41222 transitions. [2021-12-15 22:44:31,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 22:44:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 34224 states and 41222 transitions. [2021-12-15 22:44:31,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-12-15 22:44:31,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:31,648 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:31,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:44:31,649 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:31,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1083467636, now seen corresponding path program 1 times [2021-12-15 22:44:31,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:31,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332916761] [2021-12-15 22:44:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:31,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-15 22:44:31,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:31,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332916761] [2021-12-15 22:44:31,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332916761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:31,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:31,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:31,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093584189] [2021-12-15 22:44:31,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:31,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:44:31,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:31,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:44:31,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:44:31,760 INFO L87 Difference]: Start difference. First operand 34224 states and 41222 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:37,882 INFO L93 Difference]: Finished difference Result 93053 states and 113453 transitions. [2021-12-15 22:44:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:44:37,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 317 [2021-12-15 22:44:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:37,979 INFO L225 Difference]: With dead ends: 93053 [2021-12-15 22:44:37,979 INFO L226 Difference]: Without dead ends: 59618 [2021-12-15 22:44:38,017 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 22:44:38,020 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 1745 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 6068 mSolverCounterSat, 1185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1745 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 7253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1185 IncrementalHoareTripleChecker+Valid, 6068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:38,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1745 Valid, 698 Invalid, 7253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1185 Valid, 6068 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-15 22:44:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59618 states. [2021-12-15 22:44:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59618 to 57924. [2021-12-15 22:44:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57924 states, 57923 states have (on average 1.2002831345061546) internal successors, (69524), 57923 states have internal predecessors, (69524), 0 states have call successors, (0), 0 states 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 22:44:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57924 states to 57924 states and 69524 transitions. [2021-12-15 22:44:38,920 INFO L78 Accepts]: Start accepts. Automaton has 57924 states and 69524 transitions. Word has length 317 [2021-12-15 22:44:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:38,921 INFO L470 AbstractCegarLoop]: Abstraction has 57924 states and 69524 transitions. [2021-12-15 22:44:38,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 57924 states and 69524 transitions. [2021-12-15 22:44:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-12-15 22:44:38,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:38,926 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 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 22:44:38,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:44:38,926 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash 862579398, now seen corresponding path program 1 times [2021-12-15 22:44:38,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:38,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253162096] [2021-12-15 22:44:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:38,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-15 22:44:39,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:39,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253162096] [2021-12-15 22:44:39,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253162096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:39,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:39,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:39,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032824346] [2021-12-15 22:44:39,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:39,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:39,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:39,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:39,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:39,205 INFO L87 Difference]: Start difference. First operand 57924 states and 69524 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 22:44:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:42,550 INFO L93 Difference]: Finished difference Result 137135 states and 163466 transitions. [2021-12-15 22:44:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:42,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 332 [2021-12-15 22:44:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:42,646 INFO L225 Difference]: With dead ends: 137135 [2021-12-15 22:44:42,647 INFO L226 Difference]: Without dead ends: 80000 [2021-12-15 22:44:42,673 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 22:44:42,676 INFO L933 BasicCegarLoop]: 1852 mSDtfsCounter, 753 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:42,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1994 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 22:44:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80000 states. [2021-12-15 22:44:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80000 to 78390. [2021-12-15 22:44:43,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78390 states, 78389 states have (on average 1.1719118753906799) internal successors, (91865), 78389 states have internal predecessors, (91865), 0 states have call successors, (0), 0 states 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 22:44:43,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78390 states to 78390 states and 91865 transitions. [2021-12-15 22:44:43,667 INFO L78 Accepts]: Start accepts. Automaton has 78390 states and 91865 transitions. Word has length 332 [2021-12-15 22:44:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:43,668 INFO L470 AbstractCegarLoop]: Abstraction has 78390 states and 91865 transitions. [2021-12-15 22:44:43,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 22:44:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 78390 states and 91865 transitions. [2021-12-15 22:44:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-12-15 22:44:43,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:43,707 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 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 22:44:43,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:44:43,708 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1984400910, now seen corresponding path program 1 times [2021-12-15 22:44:43,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:43,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172858352] [2021-12-15 22:44:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:43,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 372 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-15 22:44:43,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:43,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172858352] [2021-12-15 22:44:43,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172858352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:43,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:43,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:43,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129481068] [2021-12-15 22:44:43,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:43,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:43,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:43,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:43,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:43,805 INFO L87 Difference]: Start difference. First operand 78390 states and 91865 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 22:44:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:46,788 INFO L93 Difference]: Finished difference Result 161478 states and 188358 transitions. [2021-12-15 22:44:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 366 [2021-12-15 22:44:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:46,886 INFO L225 Difference]: With dead ends: 161478 [2021-12-15 22:44:46,887 INFO L226 Difference]: Without dead ends: 80724 [2021-12-15 22:44:46,929 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 22:44:46,930 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 1036 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:46,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1645 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:44:46,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80724 states. [2021-12-15 22:44:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80724 to 75993. [2021-12-15 22:44:47,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75993 states, 75992 states have (on average 1.1158411411727551) internal successors, (84795), 75992 states have internal predecessors, (84795), 0 states have call successors, (0), 0 states 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 22:44:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75993 states to 75993 states and 84795 transitions. [2021-12-15 22:44:47,915 INFO L78 Accepts]: Start accepts. Automaton has 75993 states and 84795 transitions. Word has length 366 [2021-12-15 22:44:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:47,916 INFO L470 AbstractCegarLoop]: Abstraction has 75993 states and 84795 transitions. [2021-12-15 22:44:47,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 22:44:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand 75993 states and 84795 transitions. [2021-12-15 22:44:47,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-12-15 22:44:47,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:47,922 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-15 22:44:47,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:44:47,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:47,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:47,922 INFO L85 PathProgramCache]: Analyzing trace with hash 968010675, now seen corresponding path program 1 times [2021-12-15 22:44:47,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:47,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703386241] [2021-12-15 22:44:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:47,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 265 proven. 110 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-15 22:44:48,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:48,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703386241] [2021-12-15 22:44:48,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703386241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:44:48,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675697918] [2021-12-15 22:44:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:48,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:44:48,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:44:48,207 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 22:44:48,271 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 22:44:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:48,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:44:48,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:44:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-15 22:44:49,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:44:49,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675697918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:49,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:44:49,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 22:44:49,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191068639] [2021-12-15 22:44:49,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:49,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:49,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:49,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:49,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:44:49,103 INFO L87 Difference]: Start difference. First operand 75993 states and 84795 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states 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 22:44:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:52,081 INFO L93 Difference]: Finished difference Result 149620 states and 166921 transitions. [2021-12-15 22:44:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:52,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 375 [2021-12-15 22:44:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:52,163 INFO L225 Difference]: With dead ends: 149620 [2021-12-15 22:44:52,164 INFO L226 Difference]: Without dead ends: 74416 [2021-12-15 22:44:52,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:44:52,200 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1113 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:52,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 1421 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:44:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74416 states. [2021-12-15 22:44:52,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74416 to 74415. [2021-12-15 22:44:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74415 states, 74414 states have (on average 1.0907490525976296) internal successors, (81167), 74414 states have internal predecessors, (81167), 0 states have call successors, (0), 0 states 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 22:44:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74415 states to 74415 states and 81167 transitions. [2021-12-15 22:44:52,926 INFO L78 Accepts]: Start accepts. Automaton has 74415 states and 81167 transitions. Word has length 375 [2021-12-15 22:44:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:52,926 INFO L470 AbstractCegarLoop]: Abstraction has 74415 states and 81167 transitions. [2021-12-15 22:44:52,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states 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 22:44:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 74415 states and 81167 transitions. [2021-12-15 22:44:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-12-15 22:44:52,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:52,930 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:52,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 22:44:53,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:44:53,133 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:53,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1472543204, now seen corresponding path program 1 times [2021-12-15 22:44:53,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:53,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909570948] [2021-12-15 22:44:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:53,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:44:53,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:53,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909570948] [2021-12-15 22:44:53,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909570948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:53,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:53,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:53,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240651851] [2021-12-15 22:44:53,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:53,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:44:53,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:44:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:44:53,460 INFO L87 Difference]: Start difference. First operand 74415 states and 81167 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 22:44:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:59,563 INFO L93 Difference]: Finished difference Result 212668 states and 233528 transitions. [2021-12-15 22:44:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:44:59,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 376 [2021-12-15 22:44:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:59,729 INFO L225 Difference]: With dead ends: 212668 [2021-12-15 22:44:59,729 INFO L226 Difference]: Without dead ends: 139042 [2021-12-15 22:44:59,759 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 22:44:59,760 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 1611 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 6045 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 6842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 6045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:59,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1611 Valid, 953 Invalid, 6842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 6045 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-15 22:44:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139042 states. [2021-12-15 22:45:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139042 to 135058. [2021-12-15 22:45:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135058 states, 135057 states have (on average 1.0796182352636294) internal successors, (145810), 135057 states have internal predecessors, (145810), 0 states have call successors, (0), 0 states 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 22:45:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135058 states to 135058 states and 145810 transitions. [2021-12-15 22:45:01,443 INFO L78 Accepts]: Start accepts. Automaton has 135058 states and 145810 transitions. Word has length 376 [2021-12-15 22:45:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:01,444 INFO L470 AbstractCegarLoop]: Abstraction has 135058 states and 145810 transitions. [2021-12-15 22:45:01,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 22:45:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 135058 states and 145810 transitions. [2021-12-15 22:45:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-12-15 22:45:01,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:01,451 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1] [2021-12-15 22:45:01,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:45:01,452 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1581926413, now seen corresponding path program 1 times [2021-12-15 22:45:01,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:01,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509817668] [2021-12-15 22:45:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:01,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:45:01,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:01,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509817668] [2021-12-15 22:45:01,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509817668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:01,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:01,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:01,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844470755] [2021-12-15 22:45:01,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:01,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:01,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:01,589 INFO L87 Difference]: Start difference. First operand 135058 states and 145810 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)