./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX --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 d4091e99c6c703f11d6d31e8eaec6c84e6dd277464e5b390742bbd7adf0ea708 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:36:27,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:36:27,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:36:27,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:36:27,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:36:27,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:36:27,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:36:27,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:36:27,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:36:27,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:36:27,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:36:27,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:36:27,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:36:27,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:36:27,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:36:27,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:36:27,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:36:27,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:36:27,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:36:27,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:36:27,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:36:27,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:36:27,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:36:27,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:36:27,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:36:27,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:36:27,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:36:27,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:36:27,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:36:27,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:36:27,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:36:27,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:36:27,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:36:27,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:36:27,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:36:27,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:36:27,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:36:27,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:36:27,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:36:27,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:36:27,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:36:27,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:36:27,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:36:27,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:36:27,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:36:27,230 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:36:27,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:36:27,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:36:27,232 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:36:27,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:36:27,233 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:36:27,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:36:27,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:36:27,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:36:27,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:36:27,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:36:27,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:36:27,236 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:36:27,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:36:27,237 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:36:27,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:36:27,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:36:27,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:36:27,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:36:27,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:36:27,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:36:27,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:36:27,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:36:27,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:36:27,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:36:27,241 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:36:27,242 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:36:27,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:36:27,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:36:27,243 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4091e99c6c703f11d6d31e8eaec6c84e6dd277464e5b390742bbd7adf0ea708 [2021-11-09 09:36:27,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:36:27,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:36:27,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:36:27,574 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:36:27,574 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:36:27,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-09 09:36:27,651 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/data/a611097d4/87fa86ba18344f64b40f7f2db0e329a8/FLAG157a304dc [2021-11-09 09:36:28,229 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:36:28,234 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-09 09:36:28,248 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/data/a611097d4/87fa86ba18344f64b40f7f2db0e329a8/FLAG157a304dc [2021-11-09 09:36:28,523 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/data/a611097d4/87fa86ba18344f64b40f7f2db0e329a8 [2021-11-09 09:36:28,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:36:28,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:36:28,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:36:28,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:36:28,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:36:28,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:36:28" (1/1) ... [2021-11-09 09:36:28,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad4ea5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:28, skipping insertion in model container [2021-11-09 09:36:28,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:36:28" (1/1) ... [2021-11-09 09:36:28,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:36:28,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:36:28,986 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14145,14158] [2021-11-09 09:36:29,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:36:29,074 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:36:29,208 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14145,14158] [2021-11-09 09:36:29,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:36:29,286 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:36:29,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29 WrapperNode [2021-11-09 09:36:29,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:36:29,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:36:29,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:36:29,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:36:29,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (1/1) ... [2021-11-09 09:36:29,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (1/1) ... [2021-11-09 09:36:29,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:36:29,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:36:29,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:36:29,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:36:29,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (1/1) ... [2021-11-09 09:36:29,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (1/1) ... [2021-11-09 09:36:29,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (1/1) ... [2021-11-09 09:36:29,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (1/1) ... [2021-11-09 09:36:29,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (1/1) ... [2021-11-09 09:36:29,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (1/1) ... [2021-11-09 09:36:29,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (1/1) ... [2021-11-09 09:36:29,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:36:29,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:36:29,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:36:29,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:36:29,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (1/1) ... [2021-11-09 09:36:29,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:36:29,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:29,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:36:29,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2828426d-3b62-445b-b9e4-dc6b75549c11/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:36:29,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:36:29,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:36:29,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:36:29,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:36:30,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:36:30,836 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 09:36:30,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:36:30 BoogieIcfgContainer [2021-11-09 09:36:30,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:36:30,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:36:30,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:36:30,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:36:30,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:36:28" (1/3) ... [2021-11-09 09:36:30,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e56cec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:36:30, skipping insertion in model container [2021-11-09 09:36:30,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:29" (2/3) ... [2021-11-09 09:36:30,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e56cec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:36:30, skipping insertion in model container [2021-11-09 09:36:30,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:36:30" (3/3) ... [2021-11-09 09:36:30,848 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-09 09:36:30,853 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:36:30,853 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:36:30,904 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:36:30,910 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 [2021-11-09 09:36:30,911 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:36:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 294 states, 292 states have (on average 1.7945205479452055) internal successors, (524), 293 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:30,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-09 09:36:30,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:30,950 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:30,950 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:30,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:30,954 INFO L85 PathProgramCache]: Analyzing trace with hash -37487086, now seen corresponding path program 1 times [2021-11-09 09:36:30,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:30,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025147448] [2021-11-09 09:36:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:30,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:31,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:31,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025147448] [2021-11-09 09:36:31,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025147448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:31,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:31,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:36:31,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047198919] [2021-11-09 09:36:31,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:31,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:31,539 INFO L87 Difference]: Start difference. First operand has 294 states, 292 states have (on average 1.7945205479452055) internal successors, (524), 293 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:31,753 INFO L93 Difference]: Finished difference Result 590 states and 1044 transitions. [2021-11-09 09:36:31,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:31,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-09 09:36:31,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:31,780 INFO L225 Difference]: With dead ends: 590 [2021-11-09 09:36:31,780 INFO L226 Difference]: Without dead ends: 473 [2021-11-09 09:36:31,785 INFO L786 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 [2021-11-09 09:36:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-09 09:36:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2021-11-09 09:36:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.4936170212765958) internal successors, (702), 470 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 702 transitions. [2021-11-09 09:36:31,883 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 702 transitions. Word has length 141 [2021-11-09 09:36:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:31,884 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 702 transitions. [2021-11-09 09:36:31,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 702 transitions. [2021-11-09 09:36:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-09 09:36:31,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:31,890 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:31,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:36:31,891 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash -106858572, now seen corresponding path program 1 times [2021-11-09 09:36:31,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:31,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078410587] [2021-11-09 09:36:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:31,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:32,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:32,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078410587] [2021-11-09 09:36:32,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078410587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:32,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:32,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:36:32,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999922261] [2021-11-09 09:36:32,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:32,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:32,198 INFO L87 Difference]: Start difference. First operand 471 states and 702 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:32,384 INFO L93 Difference]: Finished difference Result 1380 states and 2051 transitions. [2021-11-09 09:36:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:32,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-09 09:36:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:32,393 INFO L225 Difference]: With dead ends: 1380 [2021-11-09 09:36:32,394 INFO L226 Difference]: Without dead ends: 918 [2021-11-09 09:36:32,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-11-09 09:36:32,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 916. [2021-11-09 09:36:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.4775956284153005) internal successors, (1352), 915 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1352 transitions. [2021-11-09 09:36:32,478 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1352 transitions. Word has length 141 [2021-11-09 09:36:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:32,481 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1352 transitions. [2021-11-09 09:36:32,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1352 transitions. [2021-11-09 09:36:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-09 09:36:32,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:32,495 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:32,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:36:32,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1746789024, now seen corresponding path program 1 times [2021-11-09 09:36:32,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:32,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268068110] [2021-11-09 09:36:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:32,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:32,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:32,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268068110] [2021-11-09 09:36:32,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268068110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:32,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:32,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:36:32,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434254252] [2021-11-09 09:36:32,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:32,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:32,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:32,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:32,625 INFO L87 Difference]: Start difference. First operand 916 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:32,744 INFO L93 Difference]: Finished difference Result 2710 states and 3994 transitions. [2021-11-09 09:36:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:32,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-09 09:36:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:32,755 INFO L225 Difference]: With dead ends: 2710 [2021-11-09 09:36:32,756 INFO L226 Difference]: Without dead ends: 1822 [2021-11-09 09:36:32,758 INFO L786 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 [2021-11-09 09:36:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-11-09 09:36:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 918. [2021-11-09 09:36:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 1.4765539803707743) internal successors, (1354), 917 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1354 transitions. [2021-11-09 09:36:32,830 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1354 transitions. Word has length 142 [2021-11-09 09:36:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:32,831 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1354 transitions. [2021-11-09 09:36:32,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1354 transitions. [2021-11-09 09:36:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 09:36:32,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:32,835 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:32,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:36:32,835 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash 463094692, now seen corresponding path program 1 times [2021-11-09 09:36:32,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:32,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962980659] [2021-11-09 09:36:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:32,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:32,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:32,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962980659] [2021-11-09 09:36:32,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962980659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:32,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:32,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:36:32,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914474952] [2021-11-09 09:36:32,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:32,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:32,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:32,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:32,984 INFO L87 Difference]: Start difference. First operand 918 states and 1354 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:33,120 INFO L93 Difference]: Finished difference Result 2514 states and 3723 transitions. [2021-11-09 09:36:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-09 09:36:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:33,133 INFO L225 Difference]: With dead ends: 2514 [2021-11-09 09:36:33,134 INFO L226 Difference]: Without dead ends: 1774 [2021-11-09 09:36:33,136 INFO L786 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 [2021-11-09 09:36:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-11-09 09:36:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1772. [2021-11-09 09:36:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 1.460756634669678) internal successors, (2587), 1771 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2587 transitions. [2021-11-09 09:36:33,286 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2587 transitions. Word has length 143 [2021-11-09 09:36:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:33,287 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2587 transitions. [2021-11-09 09:36:33,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2587 transitions. [2021-11-09 09:36:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 09:36:33,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:33,291 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:33,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:36:33,292 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:33,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2076257255, now seen corresponding path program 1 times [2021-11-09 09:36:33,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:33,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085446504] [2021-11-09 09:36:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:33,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:33,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:33,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085446504] [2021-11-09 09:36:33,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085446504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:33,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:33,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:36:33,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505680861] [2021-11-09 09:36:33,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:36:33,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:33,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:36:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:33,594 INFO L87 Difference]: Start difference. First operand 1772 states and 2587 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:33,894 INFO L93 Difference]: Finished difference Result 5046 states and 7368 transitions. [2021-11-09 09:36:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:33,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-09 09:36:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:33,916 INFO L225 Difference]: With dead ends: 5046 [2021-11-09 09:36:33,916 INFO L226 Difference]: Without dead ends: 3288 [2021-11-09 09:36:33,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-11-09 09:36:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 3286. [2021-11-09 09:36:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 1.4487062404870623) internal successors, (4759), 3285 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4759 transitions. [2021-11-09 09:36:34,203 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4759 transitions. Word has length 143 [2021-11-09 09:36:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:34,203 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4759 transitions. [2021-11-09 09:36:34,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4759 transitions. [2021-11-09 09:36:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 09:36:34,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:34,210 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:34,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:36:34,211 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash 407122579, now seen corresponding path program 1 times [2021-11-09 09:36:34,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:34,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172282278] [2021-11-09 09:36:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:34,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:34,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:34,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172282278] [2021-11-09 09:36:34,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172282278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:34,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:34,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:36:34,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719260815] [2021-11-09 09:36:34,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:34,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:34,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:34,348 INFO L87 Difference]: Start difference. First operand 3286 states and 4759 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:34,878 INFO L93 Difference]: Finished difference Result 9553 states and 13784 transitions. [2021-11-09 09:36:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:34,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-09 09:36:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:34,920 INFO L225 Difference]: With dead ends: 9553 [2021-11-09 09:36:34,920 INFO L226 Difference]: Without dead ends: 6323 [2021-11-09 09:36:34,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:34,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2021-11-09 09:36:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6321. [2021-11-09 09:36:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 6320 states have (on average 1.428006329113924) internal successors, (9025), 6320 states have internal predecessors, (9025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 9025 transitions. [2021-11-09 09:36:35,453 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 9025 transitions. Word has length 143 [2021-11-09 09:36:35,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:35,454 INFO L470 AbstractCegarLoop]: Abstraction has 6321 states and 9025 transitions. [2021-11-09 09:36:35,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 9025 transitions. [2021-11-09 09:36:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-09 09:36:35,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:35,466 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:35,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:36:35,466 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1881733921, now seen corresponding path program 1 times [2021-11-09 09:36:35,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:35,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807536862] [2021-11-09 09:36:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:35,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:35,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:35,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807536862] [2021-11-09 09:36:35,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807536862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:35,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:35,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:36:35,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121744964] [2021-11-09 09:36:35,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:35,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:35,563 INFO L87 Difference]: Start difference. First operand 6321 states and 9025 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:36,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:36,335 INFO L93 Difference]: Finished difference Result 18811 states and 26842 transitions. [2021-11-09 09:36:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:36,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-09 09:36:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:36,410 INFO L225 Difference]: With dead ends: 18811 [2021-11-09 09:36:36,411 INFO L226 Difference]: Without dead ends: 12581 [2021-11-09 09:36:36,421 INFO L786 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 [2021-11-09 09:36:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12581 states. [2021-11-09 09:36:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12581 to 6331. [2021-11-09 09:36:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6331 states, 6330 states have (on average 1.4273301737756714) internal successors, (9035), 6330 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 9035 transitions. [2021-11-09 09:36:36,990 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 9035 transitions. Word has length 144 [2021-11-09 09:36:36,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:36,990 INFO L470 AbstractCegarLoop]: Abstraction has 6331 states and 9035 transitions. [2021-11-09 09:36:36,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 9035 transitions. [2021-11-09 09:36:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 09:36:37,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:37,001 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:37,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:36:37,002 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1026353394, now seen corresponding path program 1 times [2021-11-09 09:36:37,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:37,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156990660] [2021-11-09 09:36:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:37,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:37,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:37,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156990660] [2021-11-09 09:36:37,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156990660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:37,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:37,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:36:37,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415335816] [2021-11-09 09:36:37,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:37,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:37,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:37,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:37,148 INFO L87 Difference]: Start difference. First operand 6331 states and 9035 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:38,006 INFO L93 Difference]: Finished difference Result 17179 states and 24404 transitions. [2021-11-09 09:36:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:38,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-09 09:36:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:38,043 INFO L225 Difference]: With dead ends: 17179 [2021-11-09 09:36:38,043 INFO L226 Difference]: Without dead ends: 10949 [2021-11-09 09:36:38,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10949 states. [2021-11-09 09:36:38,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10949 to 10947. [2021-11-09 09:36:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10947 states, 10946 states have (on average 1.4007856751324685) internal successors, (15333), 10946 states have internal predecessors, (15333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10947 states to 10947 states and 15333 transitions. [2021-11-09 09:36:39,035 INFO L78 Accepts]: Start accepts. Automaton has 10947 states and 15333 transitions. Word has length 145 [2021-11-09 09:36:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:39,036 INFO L470 AbstractCegarLoop]: Abstraction has 10947 states and 15333 transitions. [2021-11-09 09:36:39,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 10947 states and 15333 transitions. [2021-11-09 09:36:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-09 09:36:39,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:39,058 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:39,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:36:39,058 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash 972165086, now seen corresponding path program 1 times [2021-11-09 09:36:39,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:39,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111721805] [2021-11-09 09:36:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:39,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:39,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:39,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111721805] [2021-11-09 09:36:39,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111721805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:39,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:39,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:36:39,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354530453] [2021-11-09 09:36:39,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:39,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:39,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:39,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:39,125 INFO L87 Difference]: Start difference. First operand 10947 states and 15333 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:40,482 INFO L93 Difference]: Finished difference Result 31689 states and 44543 transitions. [2021-11-09 09:36:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:40,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2021-11-09 09:36:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:40,533 INFO L225 Difference]: With dead ends: 31689 [2021-11-09 09:36:40,534 INFO L226 Difference]: Without dead ends: 21617 [2021-11-09 09:36:40,549 INFO L786 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 [2021-11-09 09:36:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21617 states. [2021-11-09 09:36:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21617 to 10967. [2021-11-09 09:36:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10967 states, 10966 states have (on average 1.4000547145723143) internal successors, (15353), 10966 states have internal predecessors, (15353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 15353 transitions. [2021-11-09 09:36:41,392 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 15353 transitions. Word has length 146 [2021-11-09 09:36:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:41,392 INFO L470 AbstractCegarLoop]: Abstraction has 10967 states and 15353 transitions. [2021-11-09 09:36:41,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 15353 transitions. [2021-11-09 09:36:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-09 09:36:41,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:41,411 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:41,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:36:41,411 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1548655907, now seen corresponding path program 1 times [2021-11-09 09:36:41,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:41,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394976266] [2021-11-09 09:36:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:41,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:41,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:41,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394976266] [2021-11-09 09:36:41,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394976266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:41,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:41,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:36:41,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845916395] [2021-11-09 09:36:41,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:36:41,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:41,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:36:41,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:41,601 INFO L87 Difference]: Start difference. First operand 10967 states and 15353 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 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) [2021-11-09 09:36:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:42,604 INFO L93 Difference]: Finished difference Result 22531 states and 31363 transitions. [2021-11-09 09:36:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 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 147 [2021-11-09 09:36:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:42,634 INFO L225 Difference]: With dead ends: 22531 [2021-11-09 09:36:42,634 INFO L226 Difference]: Without dead ends: 11789 [2021-11-09 09:36:42,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:42,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11789 states. [2021-11-09 09:36:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11789 to 11449. [2021-11-09 09:36:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11449 states, 11448 states have (on average 1.3874912648497555) internal successors, (15884), 11448 states have internal predecessors, (15884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11449 states to 11449 states and 15884 transitions. [2021-11-09 09:36:43,411 INFO L78 Accepts]: Start accepts. Automaton has 11449 states and 15884 transitions. Word has length 147 [2021-11-09 09:36:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:43,411 INFO L470 AbstractCegarLoop]: Abstraction has 11449 states and 15884 transitions. [2021-11-09 09:36:43,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 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) [2021-11-09 09:36:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 11449 states and 15884 transitions. [2021-11-09 09:36:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-09 09:36:43,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:43,431 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:43,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:36:43,431 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1691329839, now seen corresponding path program 1 times [2021-11-09 09:36:43,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:43,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649368232] [2021-11-09 09:36:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:43,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:43,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:43,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649368232] [2021-11-09 09:36:43,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649368232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:43,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:43,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:36:43,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366642731] [2021-11-09 09:36:43,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:43,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:43,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:43,582 INFO L87 Difference]: Start difference. First operand 11449 states and 15884 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 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) [2021-11-09 09:36:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:44,162 INFO L93 Difference]: Finished difference Result 18605 states and 25810 transitions. [2021-11-09 09:36:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:44,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 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 147 [2021-11-09 09:36:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:44,180 INFO L225 Difference]: With dead ends: 18605 [2021-11-09 09:36:44,181 INFO L226 Difference]: Without dead ends: 7328 [2021-11-09 09:36:44,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7328 states. [2021-11-09 09:36:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7328 to 7328. [2021-11-09 09:36:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7328 states, 7327 states have (on average 1.3816022928893135) internal successors, (10123), 7327 states have internal predecessors, (10123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7328 states to 7328 states and 10123 transitions. [2021-11-09 09:36:44,630 INFO L78 Accepts]: Start accepts. Automaton has 7328 states and 10123 transitions. Word has length 147 [2021-11-09 09:36:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:44,630 INFO L470 AbstractCegarLoop]: Abstraction has 7328 states and 10123 transitions. [2021-11-09 09:36:44,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 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) [2021-11-09 09:36:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 7328 states and 10123 transitions. [2021-11-09 09:36:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-09 09:36:44,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:44,641 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:44,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:36:44,641 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:44,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:44,642 INFO L85 PathProgramCache]: Analyzing trace with hash 477794436, now seen corresponding path program 1 times [2021-11-09 09:36:44,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:44,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413290763] [2021-11-09 09:36:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:44,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:44,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:44,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413290763] [2021-11-09 09:36:44,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413290763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:44,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:44,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:36:44,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367077649] [2021-11-09 09:36:44,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:44,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:44,703 INFO L87 Difference]: Start difference. First operand 7328 states and 10123 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:45,552 INFO L93 Difference]: Finished difference Result 19761 states and 27537 transitions. [2021-11-09 09:36:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-11-09 09:36:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:45,586 INFO L225 Difference]: With dead ends: 19761 [2021-11-09 09:36:45,586 INFO L226 Difference]: Without dead ends: 13779 [2021-11-09 09:36:45,594 INFO L786 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 [2021-11-09 09:36:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13779 states. [2021-11-09 09:36:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13779 to 13777. [2021-11-09 09:36:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.367232868757259) internal successors, (18835), 13776 states have internal predecessors, (18835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 18835 transitions. [2021-11-09 09:36:46,319 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 18835 transitions. Word has length 152 [2021-11-09 09:36:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:46,319 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 18835 transitions. [2021-11-09 09:36:46,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 18835 transitions. [2021-11-09 09:36:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-09 09:36:46,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:46,339 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:46,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:36:46,339 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1506973983, now seen corresponding path program 1 times [2021-11-09 09:36:46,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:46,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969288979] [2021-11-09 09:36:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:46,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:46,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:46,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969288979] [2021-11-09 09:36:46,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969288979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:46,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:46,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:36:46,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204786506] [2021-11-09 09:36:46,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:36:46,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:46,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:36:46,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:46,431 INFO L87 Difference]: Start difference. First operand 13777 states and 18835 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:47,738 INFO L93 Difference]: Finished difference Result 26226 states and 36201 transitions. [2021-11-09 09:36:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:36:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-11-09 09:36:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:47,774 INFO L225 Difference]: With dead ends: 26226 [2021-11-09 09:36:47,774 INFO L226 Difference]: Without dead ends: 13777 [2021-11-09 09:36:47,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:36:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13777 states. [2021-11-09 09:36:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13777 to 13777. [2021-11-09 09:36:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.3566347270615564) internal successors, (18689), 13776 states have internal predecessors, (18689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 18689 transitions. [2021-11-09 09:36:48,786 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 18689 transitions. Word has length 152 [2021-11-09 09:36:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:48,787 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 18689 transitions. [2021-11-09 09:36:48,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 18689 transitions. [2021-11-09 09:36:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-09 09:36:48,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:48,804 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:48,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:36:48,805 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash 211573798, now seen corresponding path program 1 times [2021-11-09 09:36:48,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:48,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836968339] [2021-11-09 09:36:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:48,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:48,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:48,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836968339] [2021-11-09 09:36:48,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836968339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:48,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:48,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:36:48,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871304973] [2021-11-09 09:36:48,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:48,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:48,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:48,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:48,966 INFO L87 Difference]: Start difference. First operand 13777 states and 18689 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:50,651 INFO L93 Difference]: Finished difference Result 30332 states and 42929 transitions. [2021-11-09 09:36:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:50,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-11-09 09:36:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:50,691 INFO L225 Difference]: With dead ends: 30332 [2021-11-09 09:36:50,691 INFO L226 Difference]: Without dead ends: 24358 [2021-11-09 09:36:50,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24358 states. [2021-11-09 09:36:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24358 to 24356. [2021-11-09 09:36:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24356 states, 24355 states have (on average 1.3745842742763292) internal successors, (33478), 24355 states have internal predecessors, (33478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24356 states to 24356 states and 33478 transitions. [2021-11-09 09:36:52,251 INFO L78 Accepts]: Start accepts. Automaton has 24356 states and 33478 transitions. Word has length 152 [2021-11-09 09:36:52,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:52,251 INFO L470 AbstractCegarLoop]: Abstraction has 24356 states and 33478 transitions. [2021-11-09 09:36:52,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand 24356 states and 33478 transitions. [2021-11-09 09:36:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-09 09:36:52,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:52,270 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:52,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:36:52,270 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:52,271 INFO L85 PathProgramCache]: Analyzing trace with hash 256672605, now seen corresponding path program 1 times [2021-11-09 09:36:52,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:52,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527053076] [2021-11-09 09:36:52,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:52,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:52,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:52,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527053076] [2021-11-09 09:36:52,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527053076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:52,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:52,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:36:52,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234005516] [2021-11-09 09:36:52,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:52,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:52,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:52,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:52,387 INFO L87 Difference]: Start difference. First operand 24356 states and 33478 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:53,546 INFO L93 Difference]: Finished difference Result 38417 states and 52944 transitions. [2021-11-09 09:36:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:53,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-11-09 09:36:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:53,579 INFO L225 Difference]: With dead ends: 38417 [2021-11-09 09:36:53,579 INFO L226 Difference]: Without dead ends: 19705 [2021-11-09 09:36:53,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19705 states. [2021-11-09 09:36:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19705 to 19705. [2021-11-09 09:36:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19705 states, 19704 states have (on average 1.371751928542428) internal successors, (27029), 19704 states have internal predecessors, (27029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19705 states to 19705 states and 27029 transitions. [2021-11-09 09:36:54,884 INFO L78 Accepts]: Start accepts. Automaton has 19705 states and 27029 transitions. Word has length 152 [2021-11-09 09:36:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:54,884 INFO L470 AbstractCegarLoop]: Abstraction has 19705 states and 27029 transitions. [2021-11-09 09:36:54,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 19705 states and 27029 transitions. [2021-11-09 09:36:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-09 09:36:54,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:54,899 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:54,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:36:54,899 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1780029436, now seen corresponding path program 1 times [2021-11-09 09:36:54,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:54,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901333712] [2021-11-09 09:36:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:54,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:55,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:55,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901333712] [2021-11-09 09:36:55,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901333712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:55,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:55,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:36:55,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414420883] [2021-11-09 09:36:55,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:36:55,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:55,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:36:55,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:36:55,052 INFO L87 Difference]: Start difference. First operand 19705 states and 27029 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:00,069 INFO L93 Difference]: Finished difference Result 62587 states and 90534 transitions. [2021-11-09 09:37:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:37:00,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-09 09:37:00,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:00,160 INFO L225 Difference]: With dead ends: 62587 [2021-11-09 09:37:00,160 INFO L226 Difference]: Without dead ends: 45885 [2021-11-09 09:37:00,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:37:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45885 states. [2021-11-09 09:37:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45885 to 28647. [2021-11-09 09:37:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28647 states, 28646 states have (on average 1.4067932695664316) internal successors, (40299), 28646 states have internal predecessors, (40299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28647 states to 28647 states and 40299 transitions. [2021-11-09 09:37:02,898 INFO L78 Accepts]: Start accepts. Automaton has 28647 states and 40299 transitions. Word has length 155 [2021-11-09 09:37:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:02,898 INFO L470 AbstractCegarLoop]: Abstraction has 28647 states and 40299 transitions. [2021-11-09 09:37:02,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 28647 states and 40299 transitions. [2021-11-09 09:37:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-09 09:37:02,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:02,910 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:02,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 09:37:02,910 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1190617374, now seen corresponding path program 1 times [2021-11-09 09:37:02,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:02,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907745089] [2021-11-09 09:37:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:02,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:03,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:03,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907745089] [2021-11-09 09:37:03,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907745089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:03,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:03,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:37:03,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958443136] [2021-11-09 09:37:03,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:37:03,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:03,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:37:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:37:03,026 INFO L87 Difference]: Start difference. First operand 28647 states and 40299 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:05,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:05,005 INFO L93 Difference]: Finished difference Result 53288 states and 74933 transitions. [2021-11-09 09:37:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:37:05,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-09 09:37:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:05,040 INFO L225 Difference]: With dead ends: 53288 [2021-11-09 09:37:05,040 INFO L226 Difference]: Without dead ends: 24699 [2021-11-09 09:37:05,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24699 states. [2021-11-09 09:37:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24699 to 24699. [2021-11-09 09:37:07,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24699 states, 24698 states have (on average 1.4052554862741922) internal successors, (34707), 24698 states have internal predecessors, (34707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24699 states to 24699 states and 34707 transitions. [2021-11-09 09:37:07,163 INFO L78 Accepts]: Start accepts. Automaton has 24699 states and 34707 transitions. Word has length 155 [2021-11-09 09:37:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:07,163 INFO L470 AbstractCegarLoop]: Abstraction has 24699 states and 34707 transitions. [2021-11-09 09:37:07,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 24699 states and 34707 transitions. [2021-11-09 09:37:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-09 09:37:07,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:07,172 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:07,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 09:37:07,172 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:07,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:07,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1407593907, now seen corresponding path program 1 times [2021-11-09 09:37:07,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:07,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084298871] [2021-11-09 09:37:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:07,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:07,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:07,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084298871] [2021-11-09 09:37:07,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084298871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:07,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:07,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:37:07,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917661505] [2021-11-09 09:37:07,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:37:07,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:07,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:37:07,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:37:07,347 INFO L87 Difference]: Start difference. First operand 24699 states and 34707 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:09,441 INFO L93 Difference]: Finished difference Result 46270 states and 64938 transitions. [2021-11-09 09:37:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:37:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2021-11-09 09:37:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:09,471 INFO L225 Difference]: With dead ends: 46270 [2021-11-09 09:37:09,471 INFO L226 Difference]: Without dead ends: 21835 [2021-11-09 09:37:09,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21835 states. [2021-11-09 09:37:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21835 to 21763. [2021-11-09 09:37:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21763 states, 21762 states have (on average 1.3987684955426891) internal successors, (30440), 21762 states have internal predecessors, (30440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21763 states to 21763 states and 30440 transitions. [2021-11-09 09:37:11,404 INFO L78 Accepts]: Start accepts. Automaton has 21763 states and 30440 transitions. Word has length 161 [2021-11-09 09:37:11,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:11,405 INFO L470 AbstractCegarLoop]: Abstraction has 21763 states and 30440 transitions. [2021-11-09 09:37:11,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 21763 states and 30440 transitions. [2021-11-09 09:37:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-09 09:37:11,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:11,416 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:11,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 09:37:11,417 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:11,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1801353677, now seen corresponding path program 1 times [2021-11-09 09:37:11,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:11,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133981237] [2021-11-09 09:37:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:11,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:11,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:11,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133981237] [2021-11-09 09:37:11,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133981237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:11,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:11,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:37:11,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145873272] [2021-11-09 09:37:11,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:37:11,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:11,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:37:11,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:37:11,547 INFO L87 Difference]: Start difference. First operand 21763 states and 30440 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:13,055 INFO L93 Difference]: Finished difference Result 30778 states and 43056 transitions. [2021-11-09 09:37:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:37:13,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-09 09:37:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:13,079 INFO L225 Difference]: With dead ends: 30778 [2021-11-09 09:37:13,079 INFO L226 Difference]: Without dead ends: 18884 [2021-11-09 09:37:13,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18884 states. [2021-11-09 09:37:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18884 to 18884. [2021-11-09 09:37:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18884 states, 18883 states have (on average 1.3949584282158556) internal successors, (26341), 18883 states have internal predecessors, (26341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18884 states to 18884 states and 26341 transitions. [2021-11-09 09:37:14,649 INFO L78 Accepts]: Start accepts. Automaton has 18884 states and 26341 transitions. Word has length 163 [2021-11-09 09:37:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:14,650 INFO L470 AbstractCegarLoop]: Abstraction has 18884 states and 26341 transitions. [2021-11-09 09:37:14,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 18884 states and 26341 transitions. [2021-11-09 09:37:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-09 09:37:14,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:14,657 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:14,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:37:14,658 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1487758919, now seen corresponding path program 1 times [2021-11-09 09:37:14,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:14,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613592676] [2021-11-09 09:37:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:14,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:15,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:15,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613592676] [2021-11-09 09:37:15,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613592676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:15,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:15,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-09 09:37:15,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495940860] [2021-11-09 09:37:15,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:37:15,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:15,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:37:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:37:15,766 INFO L87 Difference]: Start difference. First operand 18884 states and 26341 transitions. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:33,392 INFO L93 Difference]: Finished difference Result 70951 states and 101267 transitions. [2021-11-09 09:37:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 09:37:33,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-09 09:37:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:33,510 INFO L225 Difference]: With dead ends: 70951 [2021-11-09 09:37:33,510 INFO L226 Difference]: Without dead ends: 67665 [2021-11-09 09:37:33,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1235, Invalid=4465, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 09:37:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67665 states. [2021-11-09 09:37:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67665 to 19904. [2021-11-09 09:37:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19904 states, 19903 states have (on average 1.3838114857056725) internal successors, (27542), 19903 states have internal predecessors, (27542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19904 states to 19904 states and 27542 transitions. [2021-11-09 09:37:36,467 INFO L78 Accepts]: Start accepts. Automaton has 19904 states and 27542 transitions. Word has length 168 [2021-11-09 09:37:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:36,468 INFO L470 AbstractCegarLoop]: Abstraction has 19904 states and 27542 transitions. [2021-11-09 09:37:36,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 19904 states and 27542 transitions. [2021-11-09 09:37:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-09 09:37:36,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:36,480 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:36,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:37:36,481 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:36,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1422081639, now seen corresponding path program 1 times [2021-11-09 09:37:36,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:36,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323999339] [2021-11-09 09:37:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:36,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:36,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:36,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323999339] [2021-11-09 09:37:36,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323999339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:36,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:36,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:37:36,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987546168] [2021-11-09 09:37:36,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:37:36,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:37:36,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:36,572 INFO L87 Difference]: Start difference. First operand 19904 states and 27542 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:40,198 INFO L93 Difference]: Finished difference Result 36250 states and 52442 transitions. [2021-11-09 09:37:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:37:40,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-09 09:37:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:40,242 INFO L225 Difference]: With dead ends: 36250 [2021-11-09 09:37:40,242 INFO L226 Difference]: Without dead ends: 30868 [2021-11-09 09:37:40,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:37:40,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30868 states. [2021-11-09 09:37:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30868 to 25500. [2021-11-09 09:37:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25500 states, 25499 states have (on average 1.4120161574963723) internal successors, (36005), 25499 states have internal predecessors, (36005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25500 states to 25500 states and 36005 transitions. [2021-11-09 09:37:43,445 INFO L78 Accepts]: Start accepts. Automaton has 25500 states and 36005 transitions. Word has length 168 [2021-11-09 09:37:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:43,445 INFO L470 AbstractCegarLoop]: Abstraction has 25500 states and 36005 transitions. [2021-11-09 09:37:43,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 25500 states and 36005 transitions. [2021-11-09 09:37:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-09 09:37:43,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:43,453 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:43,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 09:37:43,453 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:43,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1392072489, now seen corresponding path program 1 times [2021-11-09 09:37:43,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:43,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554074156] [2021-11-09 09:37:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:43,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:43,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:43,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554074156] [2021-11-09 09:37:43,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554074156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:43,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:43,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:37:43,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219433294] [2021-11-09 09:37:43,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:37:43,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:37:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:43,536 INFO L87 Difference]: Start difference. First operand 25500 states and 36005 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:48,906 INFO L93 Difference]: Finished difference Result 61997 states and 89736 transitions. [2021-11-09 09:37:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:37:48,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-09 09:37:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:48,973 INFO L225 Difference]: With dead ends: 61997 [2021-11-09 09:37:48,973 INFO L226 Difference]: Without dead ends: 44973 [2021-11-09 09:37:48,990 INFO L786 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 [2021-11-09 09:37:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44973 states. [2021-11-09 09:37:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44973 to 44971. [2021-11-09 09:37:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44971 states, 44970 states have (on average 1.4144540804981098) internal successors, (63608), 44970 states have internal predecessors, (63608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44971 states to 44971 states and 63608 transitions. [2021-11-09 09:37:55,132 INFO L78 Accepts]: Start accepts. Automaton has 44971 states and 63608 transitions. Word has length 168 [2021-11-09 09:37:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:55,133 INFO L470 AbstractCegarLoop]: Abstraction has 44971 states and 63608 transitions. [2021-11-09 09:37:55,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 44971 states and 63608 transitions. [2021-11-09 09:37:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-09 09:37:55,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:55,147 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:55,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 09:37:55,148 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:55,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:55,148 INFO L85 PathProgramCache]: Analyzing trace with hash 631397051, now seen corresponding path program 1 times [2021-11-09 09:37:55,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:55,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055013113] [2021-11-09 09:37:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:55,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:55,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:55,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055013113] [2021-11-09 09:37:55,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055013113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:55,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:55,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:37:55,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834024925] [2021-11-09 09:37:55,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:37:55,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:55,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:37:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:37:55,321 INFO L87 Difference]: Start difference. First operand 44971 states and 63608 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:01,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:01,223 INFO L93 Difference]: Finished difference Result 68431 states and 99018 transitions. [2021-11-09 09:38:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:01,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-09 09:38:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:01,286 INFO L225 Difference]: With dead ends: 68431 [2021-11-09 09:38:01,286 INFO L226 Difference]: Without dead ends: 44973 [2021-11-09 09:38:01,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:38:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44973 states.