./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_stateful-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_stateful-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0 --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 c1d6cba599289c2637bd3d8da41e464d318a32e6ae6e6e0e391ff437e6ce1fcc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:11:01,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:11:01,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:11:01,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:11:01,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:11:01,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:11:01,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:11:01,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:11:01,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:11:01,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:11:01,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:11:01,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:11:01,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:11:01,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:11:01,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:11:01,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:11:01,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:11:01,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:11:01,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:11:01,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:11:01,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:11:01,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:11:01,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:11:01,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:11:01,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:11:01,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:11:01,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:11:01,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:11:01,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:11:01,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:11:01,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:11:01,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:11:01,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:11:01,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:11:01,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:11:01,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:11:01,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:11:01,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:11:01,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:11:01,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:11:01,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:11:01,236 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:11:01,264 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:11:01,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:11:01,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:11:01,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:11:01,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:11:01,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:11:01,268 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:11:01,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:11:01,268 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:11:01,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:11:01,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:11:01,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:11:01,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:11:01,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:11:01,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:11:01,270 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:11:01,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:11:01,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:11:01,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:11:01,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:11:01,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:11:01,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:11:01,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:11:01,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:11:01,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:11:01,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:11:01,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:11:01,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:11:01,274 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:11:01,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:11:01,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:11:01,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:11:01,275 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_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1d6cba599289c2637bd3d8da41e464d318a32e6ae6e6e0e391ff437e6ce1fcc [2021-11-22 15:11:01,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:11:01,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:11:01,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:11:01,633 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:11:01,633 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:11:01,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/seq-pthread/cs_stateful-2.i [2021-11-22 15:11:01,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/data/ce9ba4f4c/08fa411a9cf14ff29dc2f5d9320d626d/FLAGdfe30a0b5 [2021-11-22 15:11:02,395 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:11:02,396 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/sv-benchmarks/c/seq-pthread/cs_stateful-2.i [2021-11-22 15:11:02,414 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/data/ce9ba4f4c/08fa411a9cf14ff29dc2f5d9320d626d/FLAGdfe30a0b5 [2021-11-22 15:11:02,652 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/data/ce9ba4f4c/08fa411a9cf14ff29dc2f5d9320d626d [2021-11-22 15:11:02,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:11:02,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:11:02,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:11:02,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:11:02,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:11:02,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:11:02" (1/1) ... [2021-11-22 15:11:02,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a7b2026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:02, skipping insertion in model container [2021-11-22 15:11:02,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:11:02" (1/1) ... [2021-11-22 15:11:02,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:11:02,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:11:03,190 WARN L230 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_616a5cb2-591f-43be-86f3-dc299318df32/sv-benchmarks/c/seq-pthread/cs_stateful-2.i[23607,23620] [2021-11-22 15:11:03,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:11:03,385 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:11:03,435 WARN L230 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_616a5cb2-591f-43be-86f3-dc299318df32/sv-benchmarks/c/seq-pthread/cs_stateful-2.i[23607,23620] [2021-11-22 15:11:03,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:11:03,521 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:11:03,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03 WrapperNode [2021-11-22 15:11:03,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:11:03,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:11:03,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:11:03,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:11:03,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (1/1) ... [2021-11-22 15:11:03,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (1/1) ... [2021-11-22 15:11:03,719 INFO L137 Inliner]: procedures = 145, calls = 245, calls flagged for inlining = 63, calls inlined = 241, statements flattened = 2927 [2021-11-22 15:11:03,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:11:03,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:11:03,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:11:03,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:11:03,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (1/1) ... [2021-11-22 15:11:03,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (1/1) ... [2021-11-22 15:11:03,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (1/1) ... [2021-11-22 15:11:03,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (1/1) ... [2021-11-22 15:11:03,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (1/1) ... [2021-11-22 15:11:03,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (1/1) ... [2021-11-22 15:11:03,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (1/1) ... [2021-11-22 15:11:03,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:11:03,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:11:03,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:11:03,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:11:03,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (1/1) ... [2021-11-22 15:11:03,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:11:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:11:03,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:11:04,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:11:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:11:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-22 15:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 15:11:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:11:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-22 15:11:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:11:04,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:11:04,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:11:04,263 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:11:04,279 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:11:04,308 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-22 15:11:04,309 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-22 15:11:04,374 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-22 15:11:04,375 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-22 15:11:04,393 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-22 15:11:04,394 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-22 15:11:08,754 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##645: assume !(0 == assume_abort_if_not_~cond#1); [2021-11-22 15:11:08,755 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##644: assume 0 == assume_abort_if_not_~cond#1;assume false; [2021-11-22 15:11:08,755 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##638: assume !(0 == assume_abort_if_not_~cond#1); [2021-11-22 15:11:08,755 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##637: assume 0 == assume_abort_if_not_~cond#1;assume false; [2021-11-22 15:11:08,756 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-12: assume { :end_inline_assume_abort_if_not } true;~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256;assume -2147483648 <= __CS_cs_#t~nondet4#1 && __CS_cs_#t~nondet4#1 <= 2147483647; [2021-11-22 15:11:08,756 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-13: assume { :end_inline_assume_abort_if_not } true;~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256;assume -2147483648 <= __CS_cs_#t~nondet4#1 && __CS_cs_#t~nondet4#1 <= 2147483647; [2021-11-22 15:11:08,756 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-14: assume { :end_inline_assume_abort_if_not } true;~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256;assume -2147483648 <= __CS_cs_#t~nondet4#1 && __CS_cs_#t~nondet4#1 <= 2147483647; [2021-11-22 15:11:08,756 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-42: assume { :end_inline_assume_abort_if_not } true;~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256;assume -2147483648 <= __CS_cs_#t~nondet4#1 && __CS_cs_#t~nondet4#1 <= 2147483647; [2021-11-22 15:11:08,757 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-43: assume { :end_inline_assume_abort_if_not } true;~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256;assume -2147483648 <= __CS_cs_#t~nondet4#1 && __CS_cs_#t~nondet4#1 <= 2147483647; [2021-11-22 15:11:08,757 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-44: assume { :end_inline_assume_abort_if_not } true;~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256;assume -2147483648 <= __CS_cs_#t~nondet4#1 && __CS_cs_#t~nondet4#1 <= 2147483647; [2021-11-22 15:11:08,757 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-24: assume 0 == assume_abort_if_not_~cond#1;assume false; [2021-11-22 15:11:08,757 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-24: assume !(0 == assume_abort_if_not_~cond#1); [2021-11-22 15:11:08,758 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-72: assume { :end_inline_assume_abort_if_not } true;~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256;assume -2147483648 <= __CS_cs_#t~nondet4#1 && __CS_cs_#t~nondet4#1 <= 2147483647; [2021-11-22 15:11:08,758 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-73: assume { :end_inline_assume_abort_if_not } true;~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256;assume -2147483648 <= __CS_cs_#t~nondet4#1 && __CS_cs_#t~nondet4#1 <= 2147483647; [2021-11-22 15:11:08,758 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-74: assume { :end_inline_assume_abort_if_not } true;~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256;assume -2147483648 <= __CS_cs_#t~nondet4#1 && __CS_cs_#t~nondet4#1 <= 2147483647; [2021-11-22 15:11:08,758 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-80: assume 0 == assume_abort_if_not_~cond#1;assume false; [2021-11-22 15:11:08,759 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-80: assume !(0 == assume_abort_if_not_~cond#1); [2021-11-22 15:11:08,759 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-136: assume 0 == assume_abort_if_not_~cond#1;assume false; [2021-11-22 15:11:08,759 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-136: assume !(0 == assume_abort_if_not_~cond#1); [2021-11-22 15:11:08,759 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##378: assume !(0 == assume_abort_if_not_~cond#1); [2021-11-22 15:11:08,760 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##377: assume 0 == assume_abort_if_not_~cond#1;assume false; [2021-11-22 15:11:08,760 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##385: assume !(0 == assume_abort_if_not_~cond#1); [2021-11-22 15:11:08,760 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##384: assume 0 == assume_abort_if_not_~cond#1;assume false; [2021-11-22 15:11:08,760 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-10: assume { :end_inline___CS_cs } true; [2021-11-22 15:11:08,760 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-11: assume { :end_inline___CS_cs } true; [2021-11-22 15:11:08,761 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-12: assume { :end_inline___CS_cs } true; [2021-11-22 15:11:08,761 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-38: assume { :end_inline___CS_cs } true; [2021-11-22 15:11:08,761 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-39: assume { :end_inline___CS_cs } true; [2021-11-22 15:11:08,761 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-40: assume { :end_inline___CS_cs } true; [2021-11-22 15:11:08,761 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-66: assume { :end_inline___CS_cs } true; [2021-11-22 15:11:08,762 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-67: assume { :end_inline___CS_cs } true; [2021-11-22 15:11:08,762 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-68: assume { :end_inline___CS_cs } true; [2021-11-22 15:11:08,762 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-30: assume 0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite5#1 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-22 15:11:08,762 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-30: assume !(0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite5#1 := ~__CS_ret~0 % 256; [2021-11-22 15:11:08,763 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-32: ~__CS_ret~0 := __CS_cs_#t~ite5#1;havoc __CS_cs_#t~nondet4#1;havoc __CS_cs_#t~ite5#1; [2021-11-22 15:11:08,763 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-33: assume 0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite5#1 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-22 15:11:08,763 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-33: assume !(0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite5#1 := ~__CS_ret~0 % 256; [2021-11-22 15:11:08,763 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-35: ~__CS_ret~0 := __CS_cs_#t~ite5#1;havoc __CS_cs_#t~nondet4#1;havoc __CS_cs_#t~ite5#1; [2021-11-22 15:11:08,763 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-36: assume 0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite5#1 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-22 15:11:08,764 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-36: assume !(0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite5#1 := ~__CS_ret~0 % 256; [2021-11-22 15:11:08,764 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-38: ~__CS_ret~0 := __CS_cs_#t~ite5#1;havoc __CS_cs_#t~nondet4#1;havoc __CS_cs_#t~ite5#1; [2021-11-22 15:11:08,764 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-114: assume 0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite5#1 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-22 15:11:08,764 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-114: assume !(0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite5#1 := ~__CS_ret~0 % 256; [2021-11-22 15:11:08,765 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-116: ~__CS_ret~0 := __CS_cs_#t~ite5#1;havoc __CS_cs_#t~nondet4#1;havoc __CS_cs_#t~ite5#1; [2021-11-22 15:11:08,765 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-117: assume 0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite5#1 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-22 15:11:08,765 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-117: assume !(0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite5#1 := ~__CS_ret~0 % 256; [2021-11-22 15:11:08,765 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-119: ~__CS_ret~0 := __CS_cs_#t~ite5#1;havoc __CS_cs_#t~nondet4#1;havoc __CS_cs_#t~ite5#1; [2021-11-22 15:11:08,765 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-120: assume 0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite5#1 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-22 15:11:08,766 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-120: assume !(0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite5#1 := ~__CS_ret~0 % 256; [2021-11-22 15:11:08,766 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-122: ~__CS_ret~0 := __CS_cs_#t~ite5#1;havoc __CS_cs_#t~nondet4#1;havoc __CS_cs_#t~ite5#1; [2021-11-22 15:11:08,766 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-198: assume 0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite5#1 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-22 15:11:08,766 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-198: assume !(0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite5#1 := ~__CS_ret~0 % 256; [2021-11-22 15:11:08,766 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-200: ~__CS_ret~0 := __CS_cs_#t~ite5#1;havoc __CS_cs_#t~nondet4#1;havoc __CS_cs_#t~ite5#1; [2021-11-22 15:11:08,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-201: assume 0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite5#1 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-22 15:11:08,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-201: assume !(0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite5#1 := ~__CS_ret~0 % 256; [2021-11-22 15:11:08,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-203: ~__CS_ret~0 := __CS_cs_#t~ite5#1;havoc __CS_cs_#t~nondet4#1;havoc __CS_cs_#t~ite5#1; [2021-11-22 15:11:08,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-204: assume 0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite5#1 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-22 15:11:08,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-204: assume !(0 != __CS_cs_#t~nondet4#1 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite5#1 := ~__CS_ret~0 % 256; [2021-11-22 15:11:08,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-206: ~__CS_ret~0 := __CS_cs_#t~ite5#1;havoc __CS_cs_#t~nondet4#1;havoc __CS_cs_#t~ite5#1; [2021-11-22 15:11:08,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L746: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-22 15:11:08,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L746: assume !(0 != ~__CS_ret~0 % 256); [2021-11-22 15:11:08,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L746-2: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-22 15:11:08,769 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L746-2: assume !(0 != ~__CS_ret~0 % 256); [2021-11-22 15:11:08,769 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L746-4: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-22 15:11:08,769 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L746-4: assume !(0 != ~__CS_ret~0 % 256); [2021-11-22 15:11:08,769 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L748: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-22 15:11:08,769 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L748: assume !(0 != ~__CS_ret~0 % 256);assume { :begin_inline___CS_cs } true;havoc __CS_cs_#t~nondet3#1, __CS_cs_#t~nondet4#1, __CS_cs_#t~ite5#1, __CS_cs_~k~0#1;__CS_cs_~k~0#1 := __CS_cs_#t~nondet3#1;havoc __CS_cs_#t~nondet3#1;assume { :begin_inline_assume_abort_if_not } true;assume_abort_if_not_#in~cond#1 := (if ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256 < 2 then 1 else 0);havoc assume_abort_if_not_~cond#1;assume_abort_if_not_~cond#1 := assume_abort_if_not_#in~cond#1; [2021-11-22 15:11:08,770 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L748-2: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-22 15:11:08,770 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L748-2: assume !(0 != ~__CS_ret~0 % 256);assume { :begin_inline___CS_cs } true;havoc __CS_cs_#t~nondet3#1, __CS_cs_#t~nondet4#1, __CS_cs_#t~ite5#1, __CS_cs_~k~0#1;__CS_cs_~k~0#1 := __CS_cs_#t~nondet3#1;havoc __CS_cs_#t~nondet3#1;assume { :begin_inline_assume_abort_if_not } true;assume_abort_if_not_#in~cond#1 := (if ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256 < 2 then 1 else 0);havoc assume_abort_if_not_~cond#1;assume_abort_if_not_~cond#1 := assume_abort_if_not_#in~cond#1; [2021-11-22 15:11:08,770 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L748-4: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-22 15:11:08,770 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L748-4: assume !(0 != ~__CS_ret~0 % 256);assume { :begin_inline___CS_cs } true;havoc __CS_cs_#t~nondet3#1, __CS_cs_#t~nondet4#1, __CS_cs_#t~ite5#1, __CS_cs_~k~0#1;__CS_cs_~k~0#1 := __CS_cs_#t~nondet3#1;havoc __CS_cs_#t~nondet3#1;assume { :begin_inline_assume_abort_if_not } true;assume_abort_if_not_#in~cond#1 := (if ~__CS_round~0 % 256 + __CS_cs_~k~0#1 % 256 < 2 then 1 else 0);havoc assume_abort_if_not_~cond#1;assume_abort_if_not_~cond#1 := assume_abort_if_not_#in~cond#1; [2021-11-22 15:11:08,771 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L750: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-22 15:11:08,771 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L750: assume !(0 != ~__CS_ret~0 % 256); [2021-11-22 15:11:08,771 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L750-2: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-22 15:11:08,771 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L750-2: assume !(0 != ~__CS_ret~0 % 256); [2021-11-22 15:11:08,772 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L750-4: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-22 15:11:08,772 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L750-4: assume !(0 != ~__CS_ret~0 % 256); [2021-11-22 15:11:08,772 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##118: assume !(0 == assume_abort_if_not_~cond#1); [2021-11-22 15:11:08,772 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##117: assume 0 == assume_abort_if_not_~cond#1;assume false; [2021-11-22 15:11:08,773 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##125: assume !(0 == assume_abort_if_not_~cond#1); [2021-11-22 15:11:08,773 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume 0 == assume_abort_if_not_~cond#1;assume false; [2021-11-22 15:11:08,773 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:11:08,788 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:11:08,789 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 15:11:08,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:11:08 BoogieIcfgContainer [2021-11-22 15:11:08,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:11:08,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:11:08,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:11:08,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:11:08,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:11:02" (1/3) ... [2021-11-22 15:11:08,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d06609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:11:08, skipping insertion in model container [2021-11-22 15:11:08,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:11:03" (2/3) ... [2021-11-22 15:11:08,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d06609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:11:08, skipping insertion in model container [2021-11-22 15:11:08,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:11:08" (3/3) ... [2021-11-22 15:11:08,805 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_stateful-2.i [2021-11-22 15:11:08,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:11:08,812 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:11:08,879 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:11:08,892 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 [2021-11-22 15:11:08,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 15:11:08,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 646 states, 644 states have (on average 1.4953416149068324) internal successors, (963), 645 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:08,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 15:11:08,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:08,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:08,974 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1702935355, now seen corresponding path program 1 times [2021-11-22 15:11:08,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:08,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092184431] [2021-11-22 15:11:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:08,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:11:09,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092184431] [2021-11-22 15:11:09,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092184431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:09,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:09,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:11:09,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632662215] [2021-11-22 15:11:09,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:09,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:11:09,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:09,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:11:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:11:09,416 INFO L87 Difference]: Start difference. First operand has 646 states, 644 states have (on average 1.4953416149068324) internal successors, (963), 645 states have internal predecessors, (963), 0 states have call successors, (0), 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 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:09,559 INFO L93 Difference]: Finished difference Result 1294 states and 1932 transitions. [2021-11-22 15:11:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:11:09,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-22 15:11:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:09,583 INFO L225 Difference]: With dead ends: 1294 [2021-11-22 15:11:09,583 INFO L226 Difference]: Without dead ends: 646 [2021-11-22 15:11:09,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:11:09,594 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 4 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:09,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1730 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:11:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-22 15:11:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 643. [2021-11-22 15:11:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 1.3489096573208723) internal successors, (866), 642 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 866 transitions. [2021-11-22 15:11:09,699 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 866 transitions. Word has length 32 [2021-11-22 15:11:09,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:09,700 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 866 transitions. [2021-11-22 15:11:09,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 866 transitions. [2021-11-22 15:11:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 15:11:09,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:09,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:09,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:11:09,706 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1927964319, now seen corresponding path program 1 times [2021-11-22 15:11:09,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:09,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392451919] [2021-11-22 15:11:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:09,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:11:09,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:09,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392451919] [2021-11-22 15:11:09,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392451919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:09,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:09,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:11:09,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071191875] [2021-11-22 15:11:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:09,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:11:09,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:09,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:11:09,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:11:09,855 INFO L87 Difference]: Start difference. First operand 643 states and 866 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:09,912 INFO L93 Difference]: Finished difference Result 1285 states and 1732 transitions. [2021-11-22 15:11:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:11:09,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 15:11:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:09,921 INFO L225 Difference]: With dead ends: 1285 [2021-11-22 15:11:09,921 INFO L226 Difference]: Without dead ends: 645 [2021-11-22 15:11:09,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:11:09,931 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 1 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:09,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1723 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:11:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-22 15:11:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 644. [2021-11-22 15:11:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 1.3483670295489891) internal successors, (867), 643 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 867 transitions. [2021-11-22 15:11:09,978 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 867 transitions. Word has length 35 [2021-11-22 15:11:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:09,979 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 867 transitions. [2021-11-22 15:11:09,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 867 transitions. [2021-11-22 15:11:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-22 15:11:09,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:09,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:09,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:11:09,987 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:09,988 INFO L85 PathProgramCache]: Analyzing trace with hash 157111073, now seen corresponding path program 1 times [2021-11-22 15:11:09,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:09,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500549460] [2021-11-22 15:11:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:09,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:11:10,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:10,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500549460] [2021-11-22 15:11:10,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500549460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:11:10,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496061839] [2021-11-22 15:11:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:10,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:11:10,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:11:10,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:11:10,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:11:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:10,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:11:10,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:11:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:11:10,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:11:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:11:10,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496061839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:11:10,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:11:10,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-11-22 15:11:10,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184994451] [2021-11-22 15:11:10,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:11:10,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:11:10,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:11:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:11:10,663 INFO L87 Difference]: Start difference. First operand 644 states and 867 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:10,736 INFO L93 Difference]: Finished difference Result 1289 states and 1737 transitions. [2021-11-22 15:11:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:11:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-22 15:11:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:10,742 INFO L225 Difference]: With dead ends: 1289 [2021-11-22 15:11:10,742 INFO L226 Difference]: Without dead ends: 648 [2021-11-22 15:11:10,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:11:10,747 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 3 mSDsluCounter, 1720 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:10,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2583 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:11:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-22 15:11:10,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2021-11-22 15:11:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.3462132921174652) internal successors, (871), 647 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 871 transitions. [2021-11-22 15:11:10,783 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 871 transitions. Word has length 37 [2021-11-22 15:11:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:10,784 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 871 transitions. [2021-11-22 15:11:10,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 871 transitions. [2021-11-22 15:11:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 15:11:10,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:10,789 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:10,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:11:11,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-22 15:11:11,003 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:11,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:11,003 INFO L85 PathProgramCache]: Analyzing trace with hash -519306587, now seen corresponding path program 2 times [2021-11-22 15:11:11,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:11,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739280553] [2021-11-22 15:11:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:11,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:11:11,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:11,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739280553] [2021-11-22 15:11:11,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739280553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:11:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121221774] [2021-11-22 15:11:11,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:11:11,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:11:11,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:11:11,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:11:11,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:11:11,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-22 15:11:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:11:11,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:11:11,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:11:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 15:11:11,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:11:11,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121221774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:11,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:11:11,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-22 15:11:11,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939370417] [2021-11-22 15:11:11,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:11,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:11:11,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:11:11,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:11:11,521 INFO L87 Difference]: Start difference. First operand 648 states and 871 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:11,636 INFO L93 Difference]: Finished difference Result 1182 states and 1587 transitions. [2021-11-22 15:11:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:11:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-22 15:11:11,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:11,644 INFO L225 Difference]: With dead ends: 1182 [2021-11-22 15:11:11,645 INFO L226 Difference]: Without dead ends: 1131 [2021-11-22 15:11:11,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:11:11,647 INFO L933 BasicCegarLoop]: 1214 mSDtfsCounter, 802 mSDsluCounter, 1905 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 3119 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:11,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 3119 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:11:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-11-22 15:11:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1128. [2021-11-22 15:11:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.331854480922804) internal successors, (1501), 1127 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1501 transitions. [2021-11-22 15:11:11,715 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1501 transitions. Word has length 41 [2021-11-22 15:11:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:11,716 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1501 transitions. [2021-11-22 15:11:11,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1501 transitions. [2021-11-22 15:11:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 15:11:11,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:11,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:11,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:11:11,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:11:11,942 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:11,943 INFO L85 PathProgramCache]: Analyzing trace with hash -894170759, now seen corresponding path program 1 times [2021-11-22 15:11:11,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:11,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293883907] [2021-11-22 15:11:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:11,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:11:12,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:12,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293883907] [2021-11-22 15:11:12,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293883907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:11:12,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844643071] [2021-11-22 15:11:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:12,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:11:12,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:11:12,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:11:12,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:11:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:12,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:11:12,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:11:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:11:12,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:11:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:11:12,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844643071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:11:12,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:11:12,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-22 15:11:12,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219571956] [2021-11-22 15:11:12,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:11:12,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:11:12,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:11:12,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:11:12,590 INFO L87 Difference]: Start difference. First operand 1128 states and 1501 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:12,680 INFO L93 Difference]: Finished difference Result 2253 states and 2999 transitions. [2021-11-22 15:11:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:11:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-22 15:11:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:12,688 INFO L225 Difference]: With dead ends: 2253 [2021-11-22 15:11:12,688 INFO L226 Difference]: Without dead ends: 1137 [2021-11-22 15:11:12,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:11:12,691 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 8 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:12,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2580 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:11:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-11-22 15:11:12,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1137. [2021-11-22 15:11:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 1.330105633802817) internal successors, (1511), 1136 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1511 transitions. [2021-11-22 15:11:12,726 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1511 transitions. Word has length 75 [2021-11-22 15:11:12,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:12,728 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1511 transitions. [2021-11-22 15:11:12,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1511 transitions. [2021-11-22 15:11:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-22 15:11:12,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:12,733 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:12,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:11:12,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:11:12,951 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:12,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1344146937, now seen corresponding path program 2 times [2021-11-22 15:11:12,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:12,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505813429] [2021-11-22 15:11:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:12,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:11:17,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:17,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505813429] [2021-11-22 15:11:17,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505813429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:17,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:17,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:11:17,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516150659] [2021-11-22 15:11:17,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:17,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:11:17,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:17,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:11:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:11:17,598 INFO L87 Difference]: Start difference. First operand 1137 states and 1511 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:19,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:11:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:20,941 INFO L93 Difference]: Finished difference Result 2281 states and 3008 transitions. [2021-11-22 15:11:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:11:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-22 15:11:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:20,951 INFO L225 Difference]: With dead ends: 2281 [2021-11-22 15:11:20,951 INFO L226 Difference]: Without dead ends: 1474 [2021-11-22 15:11:20,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:11:20,954 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 296 mSDsluCounter, 2387 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:20,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 3193 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 493 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-22 15:11:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-11-22 15:11:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1240. [2021-11-22 15:11:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.328490718321227) internal successors, (1646), 1239 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1646 transitions. [2021-11-22 15:11:21,002 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1646 transitions. Word has length 84 [2021-11-22 15:11:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:21,003 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1646 transitions. [2021-11-22 15:11:21,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1646 transitions. [2021-11-22 15:11:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-22 15:11:21,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:21,007 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:21,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:11:21,007 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:21,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:21,008 INFO L85 PathProgramCache]: Analyzing trace with hash 943356837, now seen corresponding path program 1 times [2021-11-22 15:11:21,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:21,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301915893] [2021-11-22 15:11:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:21,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:11:21,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301915893] [2021-11-22 15:11:21,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301915893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:21,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:21,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:11:21,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906169363] [2021-11-22 15:11:21,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:21,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:11:21,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:21,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:11:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:11:21,160 INFO L87 Difference]: Start difference. First operand 1240 states and 1646 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:23,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:11:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:23,465 INFO L93 Difference]: Finished difference Result 2202 states and 2908 transitions. [2021-11-22 15:11:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:11:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-22 15:11:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:23,478 INFO L225 Difference]: With dead ends: 2202 [2021-11-22 15:11:23,478 INFO L226 Difference]: Without dead ends: 1904 [2021-11-22 15:11:23,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:11:23,481 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 772 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 2495 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:23,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 2495 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-22 15:11:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-11-22 15:11:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1755. [2021-11-22 15:11:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 1.339224629418472) internal successors, (2349), 1754 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2349 transitions. [2021-11-22 15:11:23,539 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2349 transitions. Word has length 84 [2021-11-22 15:11:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:23,540 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 2349 transitions. [2021-11-22 15:11:23,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2349 transitions. [2021-11-22 15:11:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-22 15:11:23,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:23,543 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:23,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:11:23,544 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:23,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1485885379, now seen corresponding path program 1 times [2021-11-22 15:11:23,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:23,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414679433] [2021-11-22 15:11:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:23,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:11:26,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:26,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414679433] [2021-11-22 15:11:26,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414679433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:26,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:26,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:11:26,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354804802] [2021-11-22 15:11:26,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:26,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:11:26,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:26,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:11:26,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:11:26,974 INFO L87 Difference]: Start difference. First operand 1755 states and 2349 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:29,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:11:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:30,105 INFO L93 Difference]: Finished difference Result 1912 states and 2533 transitions. [2021-11-22 15:11:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:11:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-22 15:11:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:30,117 INFO L225 Difference]: With dead ends: 1912 [2021-11-22 15:11:30,117 INFO L226 Difference]: Without dead ends: 1773 [2021-11-22 15:11:30,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:11:30,119 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 163 mSDsluCounter, 2319 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:30,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 3146 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 403 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-22 15:11:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-11-22 15:11:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1749. [2021-11-22 15:11:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 1.3312356979405033) internal successors, (2327), 1748 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 2327 transitions. [2021-11-22 15:11:30,176 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 2327 transitions. Word has length 84 [2021-11-22 15:11:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:30,177 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 2327 transitions. [2021-11-22 15:11:30,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 2327 transitions. [2021-11-22 15:11:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-22 15:11:30,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:30,180 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:30,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 15:11:30,181 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:30,181 INFO L85 PathProgramCache]: Analyzing trace with hash 510048291, now seen corresponding path program 1 times [2021-11-22 15:11:30,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:30,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824468894] [2021-11-22 15:11:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:30,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:11:30,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:30,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824468894] [2021-11-22 15:11:30,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824468894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:30,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:30,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:11:30,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13522513] [2021-11-22 15:11:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:30,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:11:30,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:11:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:11:30,329 INFO L87 Difference]: Start difference. First operand 1749 states and 2327 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:30,577 INFO L93 Difference]: Finished difference Result 2898 states and 3822 transitions. [2021-11-22 15:11:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:11:30,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-22 15:11:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:30,591 INFO L225 Difference]: With dead ends: 2898 [2021-11-22 15:11:30,591 INFO L226 Difference]: Without dead ends: 1816 [2021-11-22 15:11:30,594 INFO L932 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 [2021-11-22 15:11:30,594 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 1254 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:30,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1254 Valid, 1840 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:11:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-11-22 15:11:30,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1620. [2021-11-22 15:11:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 1.3335392217418158) internal successors, (2159), 1619 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2159 transitions. [2021-11-22 15:11:30,652 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2159 transitions. Word has length 84 [2021-11-22 15:11:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:30,653 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 2159 transitions. [2021-11-22 15:11:30,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2159 transitions. [2021-11-22 15:11:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-22 15:11:30,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:30,656 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:30,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 15:11:30,657 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash 272752451, now seen corresponding path program 1 times [2021-11-22 15:11:30,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:30,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627211219] [2021-11-22 15:11:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:30,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:11:30,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:30,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627211219] [2021-11-22 15:11:30,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627211219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:30,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:30,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:11:30,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636129770] [2021-11-22 15:11:30,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:30,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:11:30,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:30,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:11:30,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:11:30,763 INFO L87 Difference]: Start difference. First operand 1620 states and 2159 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:31,023 INFO L93 Difference]: Finished difference Result 2762 states and 3646 transitions. [2021-11-22 15:11:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:11:31,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-22 15:11:31,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:31,036 INFO L225 Difference]: With dead ends: 2762 [2021-11-22 15:11:31,036 INFO L226 Difference]: Without dead ends: 1679 [2021-11-22 15:11:31,040 INFO L932 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 [2021-11-22 15:11:31,041 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 1087 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:31,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 1800 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:11:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-11-22 15:11:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1483. [2021-11-22 15:11:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 1.3373819163292848) internal successors, (1982), 1482 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 1982 transitions. [2021-11-22 15:11:31,120 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 1982 transitions. Word has length 84 [2021-11-22 15:11:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:31,121 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 1982 transitions. [2021-11-22 15:11:31,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 1982 transitions. [2021-11-22 15:11:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-22 15:11:31,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:31,125 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:31,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 15:11:31,126 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1105263064, now seen corresponding path program 1 times [2021-11-22 15:11:31,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:31,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678664561] [2021-11-22 15:11:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:31,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:11:31,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:31,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678664561] [2021-11-22 15:11:31,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678664561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:31,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:31,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:11:31,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355814992] [2021-11-22 15:11:31,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:31,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:11:31,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:31,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:11:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:11:31,256 INFO L87 Difference]: Start difference. First operand 1483 states and 1982 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:32,049 INFO L93 Difference]: Finished difference Result 3513 states and 4682 transitions. [2021-11-22 15:11:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:11:32,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-22 15:11:32,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:32,070 INFO L225 Difference]: With dead ends: 3513 [2021-11-22 15:11:32,070 INFO L226 Difference]: Without dead ends: 2610 [2021-11-22 15:11:32,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:11:32,073 INFO L933 BasicCegarLoop]: 1091 mSDtfsCounter, 649 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:32,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 1768 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 15:11:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2021-11-22 15:11:32,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2110. [2021-11-22 15:11:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2109 states have (on average 1.3366524419155998) internal successors, (2819), 2109 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 2819 transitions. [2021-11-22 15:11:32,161 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 2819 transitions. Word has length 111 [2021-11-22 15:11:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:32,161 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 2819 transitions. [2021-11-22 15:11:32,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 2819 transitions. [2021-11-22 15:11:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-22 15:11:32,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:32,170 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:32,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 15:11:32,170 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1458351446, now seen corresponding path program 1 times [2021-11-22 15:11:32,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:32,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145175627] [2021-11-22 15:11:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:32,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:11:32,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:32,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145175627] [2021-11-22 15:11:32,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145175627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:32,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:32,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:11:32,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946460294] [2021-11-22 15:11:32,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:32,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:11:32,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:11:32,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:11:32,391 INFO L87 Difference]: Start difference. First operand 2110 states and 2819 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:32,657 INFO L93 Difference]: Finished difference Result 2544 states and 3367 transitions. [2021-11-22 15:11:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:11:32,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-22 15:11:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:32,670 INFO L225 Difference]: With dead ends: 2544 [2021-11-22 15:11:32,671 INFO L226 Difference]: Without dead ends: 1904 [2021-11-22 15:11:32,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:11:32,674 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 317 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:32,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1351 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:11:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-11-22 15:11:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1779. [2021-11-22 15:11:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 1.329021372328459) internal successors, (2363), 1778 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 2363 transitions. [2021-11-22 15:11:32,752 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 2363 transitions. Word has length 111 [2021-11-22 15:11:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:32,754 INFO L470 AbstractCegarLoop]: Abstraction has 1779 states and 2363 transitions. [2021-11-22 15:11:32,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 2363 transitions. [2021-11-22 15:11:32,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-22 15:11:32,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:32,763 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:32,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:11:32,763 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:32,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:32,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1802918822, now seen corresponding path program 1 times [2021-11-22 15:11:32,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:32,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002280767] [2021-11-22 15:11:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:32,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:11:34,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:34,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002280767] [2021-11-22 15:11:34,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002280767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:34,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:34,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-22 15:11:34,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011310026] [2021-11-22 15:11:34,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:34,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 15:11:34,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:34,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 15:11:34,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:11:34,688 INFO L87 Difference]: Start difference. First operand 1779 states and 2363 transitions. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:36,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:11:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:42,682 INFO L93 Difference]: Finished difference Result 3687 states and 4863 transitions. [2021-11-22 15:11:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:11:42,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-22 15:11:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:42,698 INFO L225 Difference]: With dead ends: 3687 [2021-11-22 15:11:42,698 INFO L226 Difference]: Without dead ends: 2496 [2021-11-22 15:11:42,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-11-22 15:11:42,702 INFO L933 BasicCegarLoop]: 1191 mSDtfsCounter, 1731 mSDsluCounter, 7107 mSDsCounter, 0 mSdLazyCounter, 2730 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 8298 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2730 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:42,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1731 Valid, 8298 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2730 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-22 15:11:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-11-22 15:11:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1433. [2021-11-22 15:11:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.3198324022346368) internal successors, (1890), 1432 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1890 transitions. [2021-11-22 15:11:42,773 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1890 transitions. Word has length 111 [2021-11-22 15:11:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:42,773 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 1890 transitions. [2021-11-22 15:11:42,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1890 transitions. [2021-11-22 15:11:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-22 15:11:42,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:42,778 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:42,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 15:11:42,779 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:42,779 INFO L85 PathProgramCache]: Analyzing trace with hash 463462364, now seen corresponding path program 1 times [2021-11-22 15:11:42,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:42,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669734084] [2021-11-22 15:11:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:42,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:11:45,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:45,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669734084] [2021-11-22 15:11:45,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669734084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:45,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:45,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-22 15:11:45,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35133227] [2021-11-22 15:11:45,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:45,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 15:11:45,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 15:11:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:11:45,282 INFO L87 Difference]: Start difference. First operand 1433 states and 1890 transitions. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:47,419 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:11:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:50,239 INFO L93 Difference]: Finished difference Result 2796 states and 3681 transitions. [2021-11-22 15:11:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:11:50,240 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-22 15:11:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:50,255 INFO L225 Difference]: With dead ends: 2796 [2021-11-22 15:11:50,256 INFO L226 Difference]: Without dead ends: 2219 [2021-11-22 15:11:50,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-22 15:11:50,259 INFO L933 BasicCegarLoop]: 1099 mSDtfsCounter, 766 mSDsluCounter, 5330 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 6429 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:50,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 6429 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 995 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-22 15:11:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-11-22 15:11:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1421. [2021-11-22 15:11:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 1.319718309859155) internal successors, (1874), 1420 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 1874 transitions. [2021-11-22 15:11:50,338 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 1874 transitions. Word has length 111 [2021-11-22 15:11:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:50,339 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 1874 transitions. [2021-11-22 15:11:50,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 1874 transitions. [2021-11-22 15:11:50,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-22 15:11:50,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:50,343 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:50,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 15:11:50,344 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash 2135945292, now seen corresponding path program 1 times [2021-11-22 15:11:50,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:50,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120455731] [2021-11-22 15:11:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:50,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:11:53,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:53,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120455731] [2021-11-22 15:11:53,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120455731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:11:53,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:11:53,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:11:53,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904150343] [2021-11-22 15:11:53,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:11:53,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:11:53,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:11:53,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:11:53,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:11:53,913 INFO L87 Difference]: Start difference. First operand 1421 states and 1874 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:55,541 INFO L93 Difference]: Finished difference Result 3605 states and 4688 transitions. [2021-11-22 15:11:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:11:55,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-22 15:11:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:55,554 INFO L225 Difference]: With dead ends: 3605 [2021-11-22 15:11:55,555 INFO L226 Difference]: Without dead ends: 2112 [2021-11-22 15:11:55,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:11:55,562 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 1113 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:55,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 1370 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-22 15:11:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-11-22 15:11:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1784. [2021-11-22 15:11:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.234997195737521) internal successors, (2202), 1783 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2202 transitions. [2021-11-22 15:11:55,645 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2202 transitions. Word has length 114 [2021-11-22 15:11:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:55,646 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 2202 transitions. [2021-11-22 15:11:55,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2202 transitions. [2021-11-22 15:11:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-22 15:11:55,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:55,651 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:11:55,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 15:11:55,652 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:11:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash 159233028, now seen corresponding path program 1 times [2021-11-22 15:11:55,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:55,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17600003] [2021-11-22 15:11:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:55,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:12:00,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:12:00,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17600003] [2021-11-22 15:12:00,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17600003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:12:00,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:12:00,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-22 15:12:00,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129509660] [2021-11-22 15:12:00,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:12:00,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 15:12:00,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:12:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 15:12:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:12:00,973 INFO L87 Difference]: Start difference. First operand 1784 states and 2202 transitions. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 11 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:03,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:12:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:12:05,428 INFO L93 Difference]: Finished difference Result 2621 states and 3191 transitions. [2021-11-22 15:12:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 15:12:05,429 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 11 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-22 15:12:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:12:05,440 INFO L225 Difference]: With dead ends: 2621 [2021-11-22 15:12:05,441 INFO L226 Difference]: Without dead ends: 2126 [2021-11-22 15:12:05,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-11-22 15:12:05,443 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 679 mSDsluCounter, 4945 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 5727 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:12:05,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 5727 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 995 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-22 15:12:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-11-22 15:12:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1784. [2021-11-22 15:12:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.2338754907459337) internal successors, (2200), 1783 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2200 transitions. [2021-11-22 15:12:05,524 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2200 transitions. Word has length 114 [2021-11-22 15:12:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:12:05,525 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 2200 transitions. [2021-11-22 15:12:05,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 11 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2200 transitions. [2021-11-22 15:12:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-22 15:12:05,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:12:05,530 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:12:05,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 15:12:05,531 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:12:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:12:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash -271791630, now seen corresponding path program 1 times [2021-11-22 15:12:05,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:12:05,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555633356] [2021-11-22 15:12:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:12:05,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:12:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:12:08,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:12:08,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555633356] [2021-11-22 15:12:08,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555633356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:12:08,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:12:08,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:12:08,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093446523] [2021-11-22 15:12:08,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:12:08,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:12:08,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:12:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:12:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:12:08,695 INFO L87 Difference]: Start difference. First operand 1784 states and 2200 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:10,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:12:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:12:11,622 INFO L93 Difference]: Finished difference Result 2517 states and 3076 transitions. [2021-11-22 15:12:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:12:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-22 15:12:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:12:11,632 INFO L225 Difference]: With dead ends: 2517 [2021-11-22 15:12:11,633 INFO L226 Difference]: Without dead ends: 1593 [2021-11-22 15:12:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:12:11,635 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 99 mSDsluCounter, 1849 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:12:11,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 2523 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 388 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-22 15:12:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-11-22 15:12:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1481. [2021-11-22 15:12:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 1.2317567567567567) internal successors, (1823), 1480 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 1823 transitions. [2021-11-22 15:12:11,704 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 1823 transitions. Word has length 121 [2021-11-22 15:12:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:12:11,704 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 1823 transitions. [2021-11-22 15:12:11,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 1823 transitions. [2021-11-22 15:12:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-22 15:12:11,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:12:11,709 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:12:11,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 15:12:11,710 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:12:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:12:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1979702192, now seen corresponding path program 1 times [2021-11-22 15:12:11,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:12:11,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648387461] [2021-11-22 15:12:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:12:11,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:12:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:12:14,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:12:14,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648387461] [2021-11-22 15:12:14,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648387461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:12:14,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:12:14,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:12:14,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937861165] [2021-11-22 15:12:14,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:12:14,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:12:14,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:12:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:12:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:12:14,049 INFO L87 Difference]: Start difference. First operand 1481 states and 1823 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:16,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:12:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:12:16,984 INFO L93 Difference]: Finished difference Result 1596 states and 1951 transitions. [2021-11-22 15:12:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:12:16,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-22 15:12:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:12:17,004 INFO L225 Difference]: With dead ends: 1596 [2021-11-22 15:12:17,004 INFO L226 Difference]: Without dead ends: 1468 [2021-11-22 15:12:17,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:12:17,006 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 12 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3087 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:12:17,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3087 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 389 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-22 15:12:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-11-22 15:12:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1468. [2021-11-22 15:12:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 1.2317655078391274) internal successors, (1807), 1467 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 1807 transitions. [2021-11-22 15:12:17,141 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 1807 transitions. Word has length 121 [2021-11-22 15:12:17,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:12:17,141 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 1807 transitions. [2021-11-22 15:12:17,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:17,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 1807 transitions. [2021-11-22 15:12:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-22 15:12:17,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:12:17,146 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:12:17,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 15:12:17,147 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:12:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:12:17,148 INFO L85 PathProgramCache]: Analyzing trace with hash -134932684, now seen corresponding path program 1 times [2021-11-22 15:12:17,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:12:17,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510235196] [2021-11-22 15:12:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:12:17,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:12:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:12:17,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:12:17,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510235196] [2021-11-22 15:12:17,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510235196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:12:17,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:12:17,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 15:12:17,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382270380] [2021-11-22 15:12:17,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:12:17,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:12:17,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:12:17,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:12:17,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:12:17,648 INFO L87 Difference]: Start difference. First operand 1468 states and 1807 transitions. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:19,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:12:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:12:20,246 INFO L93 Difference]: Finished difference Result 2930 states and 3549 transitions. [2021-11-22 15:12:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:12:20,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-22 15:12:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:12:20,250 INFO L225 Difference]: With dead ends: 2930 [2021-11-22 15:12:20,250 INFO L226 Difference]: Without dead ends: 1953 [2021-11-22 15:12:20,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:12:20,253 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 2095 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 3025 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:12:20,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2095 Valid, 3025 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-22 15:12:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-11-22 15:12:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 992. [2021-11-22 15:12:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 1.2129162462159435) internal successors, (1202), 991 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1202 transitions. [2021-11-22 15:12:20,311 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1202 transitions. Word has length 125 [2021-11-22 15:12:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:12:20,312 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1202 transitions. [2021-11-22 15:12:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1202 transitions. [2021-11-22 15:12:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-22 15:12:20,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:12:20,316 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:12:20,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 15:12:20,316 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:12:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:12:20,317 INFO L85 PathProgramCache]: Analyzing trace with hash -314248705, now seen corresponding path program 1 times [2021-11-22 15:12:20,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:12:20,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338290352] [2021-11-22 15:12:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:12:20,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:12:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:12:22,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:12:22,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338290352] [2021-11-22 15:12:22,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338290352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:12:22,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:12:22,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:12:22,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812522337] [2021-11-22 15:12:22,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:12:22,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:12:22,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:12:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:12:22,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:12:22,823 INFO L87 Difference]: Start difference. First operand 992 states and 1202 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:12:24,067 INFO L93 Difference]: Finished difference Result 2267 states and 2762 transitions. [2021-11-22 15:12:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:12:24,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 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 126 [2021-11-22 15:12:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:12:24,070 INFO L225 Difference]: With dead ends: 2267 [2021-11-22 15:12:24,070 INFO L226 Difference]: Without dead ends: 1524 [2021-11-22 15:12:24,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:12:24,072 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 451 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:12:24,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 1839 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 15:12:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-11-22 15:12:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1323. [2021-11-22 15:12:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 1.2034795763993948) internal successors, (1591), 1322 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1591 transitions. [2021-11-22 15:12:24,139 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1591 transitions. Word has length 126 [2021-11-22 15:12:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:12:24,139 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 1591 transitions. [2021-11-22 15:12:24,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1591 transitions. [2021-11-22 15:12:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-22 15:12:24,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:12:24,143 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:12:24,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-22 15:12:24,144 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:12:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:12:24,145 INFO L85 PathProgramCache]: Analyzing trace with hash -241862147, now seen corresponding path program 1 times [2021-11-22 15:12:24,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:12:24,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309949911] [2021-11-22 15:12:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:12:24,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:12:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:12:27,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:12:27,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309949911] [2021-11-22 15:12:27,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309949911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:12:27,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:12:27,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:12:27,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415966840] [2021-11-22 15:12:27,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:12:27,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:12:27,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:12:27,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:12:27,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:12:27,512 INFO L87 Difference]: Start difference. First operand 1323 states and 1591 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:12:28,746 INFO L93 Difference]: Finished difference Result 2556 states and 3041 transitions. [2021-11-22 15:12:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:12:28,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 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 126 [2021-11-22 15:12:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:12:28,749 INFO L225 Difference]: With dead ends: 2556 [2021-11-22 15:12:28,749 INFO L226 Difference]: Without dead ends: 1336 [2021-11-22 15:12:28,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:12:28,752 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 980 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:12:28,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 1098 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 15:12:28,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-11-22 15:12:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1236. [2021-11-22 15:12:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 1.1748987854251012) internal successors, (1451), 1235 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1451 transitions. [2021-11-22 15:12:28,834 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1451 transitions. Word has length 126 [2021-11-22 15:12:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:12:28,835 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1451 transitions. [2021-11-22 15:12:28,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1451 transitions. [2021-11-22 15:12:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-22 15:12:28,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:12:28,838 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:12:28,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-22 15:12:28,839 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:12:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:12:28,839 INFO L85 PathProgramCache]: Analyzing trace with hash -179822533, now seen corresponding path program 1 times [2021-11-22 15:12:28,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:12:28,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139997133] [2021-11-22 15:12:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:12:28,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:12:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:12:31,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:12:31,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139997133] [2021-11-22 15:12:31,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139997133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:12:31,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:12:31,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 15:12:31,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251907067] [2021-11-22 15:12:31,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:12:31,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 15:12:31,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:12:31,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 15:12:31,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-22 15:12:31,795 INFO L87 Difference]: Start difference. First operand 1236 states and 1451 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:33,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:12:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:12:34,801 INFO L93 Difference]: Finished difference Result 1453 states and 1687 transitions. [2021-11-22 15:12:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:12:34,802 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 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 126 [2021-11-22 15:12:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:12:34,804 INFO L225 Difference]: With dead ends: 1453 [2021-11-22 15:12:34,804 INFO L226 Difference]: Without dead ends: 1429 [2021-11-22 15:12:34,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:12:34,806 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 840 mSDsluCounter, 3873 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 4524 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:12:34,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 4524 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 634 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-22 15:12:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2021-11-22 15:12:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1249. [2021-11-22 15:12:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.1730769230769231) internal successors, (1464), 1248 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1464 transitions. [2021-11-22 15:12:34,888 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1464 transitions. Word has length 126 [2021-11-22 15:12:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:12:34,889 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1464 transitions. [2021-11-22 15:12:34,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1464 transitions. [2021-11-22 15:12:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-22 15:12:34,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:12:34,892 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:12:34,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-22 15:12:34,893 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:12:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:12:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash -289989356, now seen corresponding path program 1 times [2021-11-22 15:12:34,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:12:34,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976210668] [2021-11-22 15:12:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:12:34,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:12:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:13:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:13:04,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:13:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976210668] [2021-11-22 15:13:04,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976210668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:13:04,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:13:04,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-11-22 15:13:04,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83305506] [2021-11-22 15:13:04,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:13:04,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-22 15:13:04,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:13:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-22 15:13:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 15:13:04,855 INFO L87 Difference]: Start difference. First operand 1249 states and 1464 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:07,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:13:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:13:36,943 INFO L93 Difference]: Finished difference Result 1628 states and 1883 transitions. [2021-11-22 15:13:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-22 15:13:36,950 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 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 130 [2021-11-22 15:13:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:13:36,955 INFO L225 Difference]: With dead ends: 1628 [2021-11-22 15:13:36,955 INFO L226 Difference]: Without dead ends: 1555 [2021-11-22 15:13:36,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=414, Invalid=3618, Unknown=0, NotChecked=0, Total=4032 [2021-11-22 15:13:36,958 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 1065 mSDsluCounter, 8753 mSDsCounter, 0 mSdLazyCounter, 7292 mSolverCounterSat, 182 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 9296 SdHoareTripleChecker+Invalid, 7475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 7292 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:13:36,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1065 Valid, 9296 Invalid, 7475 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [182 Valid, 7292 Invalid, 1 Unknown, 0 Unchecked, 16.8s Time] [2021-11-22 15:13:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-11-22 15:13:37,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1382. [2021-11-22 15:13:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1382 states, 1381 states have (on average 1.1723388848660392) internal successors, (1619), 1381 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 1619 transitions. [2021-11-22 15:13:37,057 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 1619 transitions. Word has length 130 [2021-11-22 15:13:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:13:37,058 INFO L470 AbstractCegarLoop]: Abstraction has 1382 states and 1619 transitions. [2021-11-22 15:13:37,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 1619 transitions. [2021-11-22 15:13:37,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-22 15:13:37,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:13:37,062 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:13:37,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-22 15:13:37,063 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:13:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:13:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1933541937, now seen corresponding path program 1 times [2021-11-22 15:13:37,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:13:37,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247954081] [2021-11-22 15:13:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:13:37,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:13:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:13:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:13:40,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:13:40,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247954081] [2021-11-22 15:13:40,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247954081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:13:40,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:13:40,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-22 15:13:40,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513313865] [2021-11-22 15:13:40,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:13:40,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 15:13:40,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:13:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 15:13:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:13:40,849 INFO L87 Difference]: Start difference. First operand 1382 states and 1619 transitions. Second operand has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 11 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:42,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:13:44,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:13:44,323 INFO L93 Difference]: Finished difference Result 1730 states and 1991 transitions. [2021-11-22 15:13:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:13:44,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 11 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-22 15:13:44,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:13:44,327 INFO L225 Difference]: With dead ends: 1730 [2021-11-22 15:13:44,327 INFO L226 Difference]: Without dead ends: 1706 [2021-11-22 15:13:44,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-11-22 15:13:44,329 INFO L933 BasicCegarLoop]: 685 mSDtfsCounter, 950 mSDsluCounter, 4983 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 5668 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:13:44,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 5668 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1054 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-22 15:13:44,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-11-22 15:13:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1376. [2021-11-22 15:13:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 1.1730909090909092) internal successors, (1613), 1375 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1613 transitions. [2021-11-22 15:13:44,435 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1613 transitions. Word has length 135 [2021-11-22 15:13:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:13:44,436 INFO L470 AbstractCegarLoop]: Abstraction has 1376 states and 1613 transitions. [2021-11-22 15:13:44,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 11 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1613 transitions. [2021-11-22 15:13:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-22 15:13:44,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:13:44,439 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:13:44,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-22 15:13:44,440 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:13:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:13:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash -997422115, now seen corresponding path program 1 times [2021-11-22 15:13:44,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:13:44,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572640197] [2021-11-22 15:13:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:13:44,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:13:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:13:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:13:44,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:13:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572640197] [2021-11-22 15:13:44,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572640197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:13:44,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:13:44,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:13:44,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071427473] [2021-11-22 15:13:44,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:13:44,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:13:44,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:13:44,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:13:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:13:44,853 INFO L87 Difference]: Start difference. First operand 1376 states and 1613 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:46,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:13:48,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:13:50,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:13:50,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:13:50,528 INFO L93 Difference]: Finished difference Result 1459 states and 1699 transitions. [2021-11-22 15:13:50,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:13:50,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-22 15:13:50,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:13:50,532 INFO L225 Difference]: With dead ends: 1459 [2021-11-22 15:13:50,532 INFO L226 Difference]: Without dead ends: 1149 [2021-11-22 15:13:50,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-22 15:13:50,534 INFO L933 BasicCegarLoop]: 449 mSDtfsCounter, 1511 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:13:50,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1113 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-11-22 15:13:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-22 15:13:50,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1096. [2021-11-22 15:13:50,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 1.16986301369863) internal successors, (1281), 1095 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1281 transitions. [2021-11-22 15:13:50,625 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1281 transitions. Word has length 137 [2021-11-22 15:13:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:13:50,625 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1281 transitions. [2021-11-22 15:13:50,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1281 transitions. [2021-11-22 15:13:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-22 15:13:50,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:13:50,629 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:13:50,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-22 15:13:50,630 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:13:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:13:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash 826603839, now seen corresponding path program 1 times [2021-11-22 15:13:50,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:13:50,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953166979] [2021-11-22 15:13:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:13:50,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:13:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:13:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 15:13:53,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:13:53,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953166979] [2021-11-22 15:13:53,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953166979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:13:53,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:13:53,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-22 15:13:53,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292772618] [2021-11-22 15:13:53,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:13:53,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 15:13:53,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:13:53,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 15:13:53,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:13:53,915 INFO L87 Difference]: Start difference. First operand 1096 states and 1281 transitions. Second operand has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 13 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:55,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:13:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:13:57,013 INFO L93 Difference]: Finished difference Result 1482 states and 1707 transitions. [2021-11-22 15:13:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:13:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 13 states have internal predecessors, (125), 0 states have call successors, (0), 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 138 [2021-11-22 15:13:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:13:57,016 INFO L225 Difference]: With dead ends: 1482 [2021-11-22 15:13:57,017 INFO L226 Difference]: Without dead ends: 1458 [2021-11-22 15:13:57,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-11-22 15:13:57,018 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 1834 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1834 SdHoareTripleChecker+Valid, 3387 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:13:57,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1834 Valid, 3387 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 688 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-22 15:13:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-11-22 15:13:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1137. [2021-11-22 15:13:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 1.169894366197183) internal successors, (1329), 1136 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1329 transitions. [2021-11-22 15:13:57,120 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1329 transitions. Word has length 138 [2021-11-22 15:13:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:13:57,121 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1329 transitions. [2021-11-22 15:13:57,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 13 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1329 transitions. [2021-11-22 15:13:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-22 15:13:57,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:13:57,125 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:13:57,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-22 15:13:57,125 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:13:57,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:13:57,126 INFO L85 PathProgramCache]: Analyzing trace with hash 833849778, now seen corresponding path program 1 times [2021-11-22 15:13:57,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:13:57,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437678196] [2021-11-22 15:13:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:13:57,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:14:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 15:15:06,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437678196] [2021-11-22 15:15:06,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437678196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751863021] [2021-11-22 15:15:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:06,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:06,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:06,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_616a5cb2-591f-43be-86f3-dc299318df32/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:15:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:07,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 161 conjunts are in the unsatisfiable core [2021-11-22 15:15:07,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:07,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-22 15:15:09,227 INFO L354 Elim1Store]: treesize reduction 1492, result has 13.2 percent of original size [2021-11-22 15:15:09,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 67 case distinctions, treesize of input 131 treesize of output 314 [2021-11-22 15:15:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:16:08,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:16:08,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:16:08,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:16:08,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:16:08,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:16:08,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:16:09,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:16:09,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:16:09,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:22:03,429 INFO L244 Elim1Store]: Index analysis took 354710 ms