./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be --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 c3fe517c51c5e8fb31577c2325f977891c14909f163a953939dc0a15f16ec6d9 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be --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 c3fe517c51c5e8fb31577c2325f977891c14909f163a953939dc0a15f16ec6d9 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:57:36,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:57:36,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:57:36,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:57:36,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:57:36,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:57:36,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:57:36,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:57:36,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:57:36,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:57:36,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:57:36,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:57:36,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:57:36,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:57:36,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:57:36,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:57:36,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:57:36,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:57:37,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:57:37,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:57:37,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:57:37,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:57:37,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:57:37,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:57:37,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:57:37,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:57:37,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:57:37,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:57:37,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:57:37,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:57:37,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:57:37,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:57:37,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:57:37,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:57:37,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:57:37,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:57:37,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:57:37,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:57:37,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:57:37,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:57:37,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:57:37,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:57:37,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:57:37,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:57:37,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:57:37,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:57:37,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:57:37,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:57:37,103 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:57:37,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:57:37,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:57:37,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:57:37,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:57:37,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:57:37,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:57:37,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:57:37,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:57:37,112 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:57:37,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:57:37,113 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:57:37,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:57:37,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:57:37,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:57:37,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:57:37,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:57:37,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:57:37,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:57:37,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:57:37,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:57:37,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:57:37,116 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:57:37,118 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:57:37,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:57:37,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:57:37,119 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_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3fe517c51c5e8fb31577c2325f977891c14909f163a953939dc0a15f16ec6d9 [2021-10-21 19:57:37,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:57:37,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:57:37,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:57:37,502 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:57:37,502 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:57:37,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c [2021-10-21 19:57:37,584 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/data/7201bbccc/87afcfe1741f470598be97e55e303db8/FLAG8a7fb1de8 [2021-10-21 19:57:38,352 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:57:38,353 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c [2021-10-21 19:57:38,385 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/data/7201bbccc/87afcfe1741f470598be97e55e303db8/FLAG8a7fb1de8 [2021-10-21 19:57:38,470 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/data/7201bbccc/87afcfe1741f470598be97e55e303db8 [2021-10-21 19:57:38,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:57:38,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:57:38,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:57:38,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:57:38,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:57:38,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:57:38" (1/1) ... [2021-10-21 19:57:38,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50763594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:38, skipping insertion in model container [2021-10-21 19:57:38,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:57:38" (1/1) ... [2021-10-21 19:57:38,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:57:38,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:57:39,190 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c[72493,72506] [2021-10-21 19:57:39,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:57:39,221 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:57:39,384 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c[72493,72506] [2021-10-21 19:57:39,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:57:39,429 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:57:39,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39 WrapperNode [2021-10-21 19:57:39,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:57:39,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:57:39,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:57:39,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:57:39,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (1/1) ... [2021-10-21 19:57:39,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (1/1) ... [2021-10-21 19:57:39,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:57:39,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:57:39,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:57:39,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:57:39,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (1/1) ... [2021-10-21 19:57:39,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (1/1) ... [2021-10-21 19:57:39,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (1/1) ... [2021-10-21 19:57:39,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (1/1) ... [2021-10-21 19:57:39,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (1/1) ... [2021-10-21 19:57:39,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (1/1) ... [2021-10-21 19:57:39,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (1/1) ... [2021-10-21 19:57:39,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:57:39,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:57:39,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:57:39,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:57:39,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (1/1) ... [2021-10-21 19:57:39,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:57:39,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:39,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:57:39,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:57:39,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:57:39,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:57:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:57:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:57:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:57:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:57:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:57:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:57:39,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:57:40,108 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-21 19:57:43,168 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-21 19:57:43,169 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-21 19:57:43,179 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:57:43,180 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-21 19:57:43,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:57:43 BoogieIcfgContainer [2021-10-21 19:57:43,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:57:43,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:57:43,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:57:43,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:57:43,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:57:38" (1/3) ... [2021-10-21 19:57:43,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1644e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:57:43, skipping insertion in model container [2021-10-21 19:57:43,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:39" (2/3) ... [2021-10-21 19:57:43,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1644e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:57:43, skipping insertion in model container [2021-10-21 19:57:43,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:57:43" (3/3) ... [2021-10-21 19:57:43,193 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.03.i.cil.c [2021-10-21 19:57:43,200 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:57:43,200 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:57:43,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:57:43,269 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 [2021-10-21 19:57:43,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:57:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:57:43,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:43,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:43,326 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:43,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:43,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1430119920, now seen corresponding path program 1 times [2021-10-21 19:57:43,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:43,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137937630] [2021-10-21 19:57:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:43,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:44,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:44,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137937630] [2021-10-21 19:57:44,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137937630] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:57:44,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:57:44,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:57:44,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809379541] [2021-10-21 19:57:44,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:57:44,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:44,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:57:44,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:57:44,063 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:46,695 INFO L93 Difference]: Finished difference Result 315 states and 530 transitions. [2021-10-21 19:57:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:57:46,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-21 19:57:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:46,712 INFO L225 Difference]: With dead ends: 315 [2021-10-21 19:57:46,712 INFO L226 Difference]: Without dead ends: 160 [2021-10-21 19:57:46,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:57:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-21 19:57:46,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2021-10-21 19:57:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5422535211267605) internal successors, (219), 142 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 219 transitions. [2021-10-21 19:57:46,773 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 219 transitions. Word has length 47 [2021-10-21 19:57:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:46,774 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 219 transitions. [2021-10-21 19:57:46,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 219 transitions. [2021-10-21 19:57:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-21 19:57:46,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:46,779 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:46,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:57:46,780 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:46,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1036819743, now seen corresponding path program 1 times [2021-10-21 19:57:46,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:46,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491514446] [2021-10-21 19:57:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:46,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:46,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:46,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491514446] [2021-10-21 19:57:46,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491514446] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:57:46,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:57:46,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:57:46,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010052606] [2021-10-21 19:57:46,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:57:46,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:46,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:57:46,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:57:46,993 INFO L87 Difference]: Start difference. First operand 143 states and 219 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:49,469 INFO L93 Difference]: Finished difference Result 282 states and 426 transitions. [2021-10-21 19:57:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:57:49,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-10-21 19:57:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:49,472 INFO L225 Difference]: With dead ends: 282 [2021-10-21 19:57:49,472 INFO L226 Difference]: Without dead ends: 160 [2021-10-21 19:57:49,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:57:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-21 19:57:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2021-10-21 19:57:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5352112676056338) internal successors, (218), 142 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 218 transitions. [2021-10-21 19:57:49,489 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 218 transitions. Word has length 60 [2021-10-21 19:57:49,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:49,489 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 218 transitions. [2021-10-21 19:57:49,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:49,490 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 218 transitions. [2021-10-21 19:57:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:57:49,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:49,493 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:57:49,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:57:49,494 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:49,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:49,495 INFO L82 PathProgramCache]: Analyzing trace with hash 622344944, now seen corresponding path program 1 times [2021-10-21 19:57:49,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:49,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608711963] [2021-10-21 19:57:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:49,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:49,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:49,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608711963] [2021-10-21 19:57:49,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608711963] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:57:49,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:57:49,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:57:49,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608376601] [2021-10-21 19:57:49,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:57:49,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:57:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:57:49,627 INFO L87 Difference]: Start difference. First operand 143 states and 218 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:52,089 INFO L93 Difference]: Finished difference Result 281 states and 424 transitions. [2021-10-21 19:57:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:57:52,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-21 19:57:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:52,092 INFO L225 Difference]: With dead ends: 281 [2021-10-21 19:57:52,092 INFO L226 Difference]: Without dead ends: 159 [2021-10-21 19:57:52,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:57:52,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-21 19:57:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2021-10-21 19:57:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.528169014084507) internal successors, (217), 142 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 217 transitions. [2021-10-21 19:57:52,104 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 217 transitions. Word has length 61 [2021-10-21 19:57:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:52,104 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 217 transitions. [2021-10-21 19:57:52,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 217 transitions. [2021-10-21 19:57:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:57:52,107 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:52,107 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:57:52,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:57:52,108 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:52,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1460355716, now seen corresponding path program 1 times [2021-10-21 19:57:52,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:52,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752663154] [2021-10-21 19:57:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:52,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:52,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:52,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752663154] [2021-10-21 19:57:52,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752663154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:57:52,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:57:52,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:57:52,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240317064] [2021-10-21 19:57:52,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:57:52,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:57:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:57:52,189 INFO L87 Difference]: Start difference. First operand 143 states and 217 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:52,999 INFO L93 Difference]: Finished difference Result 281 states and 423 transitions. [2021-10-21 19:57:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:57:53,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-21 19:57:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:53,001 INFO L225 Difference]: With dead ends: 281 [2021-10-21 19:57:53,001 INFO L226 Difference]: Without dead ends: 159 [2021-10-21 19:57:53,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:57:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-21 19:57:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2021-10-21 19:57:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5211267605633803) internal successors, (216), 142 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 216 transitions. [2021-10-21 19:57:53,018 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 216 transitions. Word has length 61 [2021-10-21 19:57:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:53,020 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 216 transitions. [2021-10-21 19:57:53,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 216 transitions. [2021-10-21 19:57:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:57:53,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:53,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:53,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:57:53,028 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:53,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1380080741, now seen corresponding path program 1 times [2021-10-21 19:57:53,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:53,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282307411] [2021-10-21 19:57:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:53,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:53,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:53,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282307411] [2021-10-21 19:57:53,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282307411] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:57:53,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:57:53,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:57:53,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649820845] [2021-10-21 19:57:53,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:57:53,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:53,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:57:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:57:53,145 INFO L87 Difference]: Start difference. First operand 143 states and 216 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:55,512 INFO L93 Difference]: Finished difference Result 280 states and 421 transitions. [2021-10-21 19:57:55,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:57:55,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-21 19:57:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:55,515 INFO L225 Difference]: With dead ends: 280 [2021-10-21 19:57:55,515 INFO L226 Difference]: Without dead ends: 158 [2021-10-21 19:57:55,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:57:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-21 19:57:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 143. [2021-10-21 19:57:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5140845070422535) internal successors, (215), 142 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 215 transitions. [2021-10-21 19:57:55,525 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 215 transitions. Word has length 61 [2021-10-21 19:57:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:55,525 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 215 transitions. [2021-10-21 19:57:55,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 215 transitions. [2021-10-21 19:57:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:57:55,538 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:55,538 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:55,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:57:55,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:55,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:55,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1965538395, now seen corresponding path program 1 times [2021-10-21 19:57:55,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:55,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767871783] [2021-10-21 19:57:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:55,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:55,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:55,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767871783] [2021-10-21 19:57:55,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767871783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:57:55,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:57:55,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:57:55,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810418598] [2021-10-21 19:57:55,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:57:55,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:57:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:57:55,627 INFO L87 Difference]: Start difference. First operand 143 states and 215 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:58,016 INFO L93 Difference]: Finished difference Result 278 states and 418 transitions. [2021-10-21 19:57:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:57:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-21 19:57:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:58,018 INFO L225 Difference]: With dead ends: 278 [2021-10-21 19:57:58,018 INFO L226 Difference]: Without dead ends: 156 [2021-10-21 19:57:58,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:57:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-21 19:57:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2021-10-21 19:57:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5070422535211268) internal successors, (214), 142 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 214 transitions. [2021-10-21 19:57:58,026 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 214 transitions. Word has length 61 [2021-10-21 19:57:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:58,026 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 214 transitions. [2021-10-21 19:57:58,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 214 transitions. [2021-10-21 19:57:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-21 19:57:58,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:58,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:58,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:57:58,028 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:58,028 INFO L82 PathProgramCache]: Analyzing trace with hash -96300664, now seen corresponding path program 1 times [2021-10-21 19:57:58,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:58,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353795236] [2021-10-21 19:57:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:58,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:58,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:58,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353795236] [2021-10-21 19:57:58,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353795236] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:57:58,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:57:58,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:57:58,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295938486] [2021-10-21 19:57:58,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:57:58,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:57:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:57:58,137 INFO L87 Difference]: Start difference. First operand 143 states and 214 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:00,497 INFO L93 Difference]: Finished difference Result 278 states and 417 transitions. [2021-10-21 19:58:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:00,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-10-21 19:58:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:00,499 INFO L225 Difference]: With dead ends: 278 [2021-10-21 19:58:00,499 INFO L226 Difference]: Without dead ends: 156 [2021-10-21 19:58:00,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-21 19:58:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2021-10-21 19:58:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5) internal successors, (213), 142 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 213 transitions. [2021-10-21 19:58:00,507 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 213 transitions. Word has length 62 [2021-10-21 19:58:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:00,507 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 213 transitions. [2021-10-21 19:58:00,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 213 transitions. [2021-10-21 19:58:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-21 19:58:00,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:00,509 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:00,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:58:00,510 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:00,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:00,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1146804983, now seen corresponding path program 1 times [2021-10-21 19:58:00,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:00,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105939130] [2021-10-21 19:58:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:00,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:00,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:00,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105939130] [2021-10-21 19:58:00,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105939130] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:00,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:00,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:00,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673930602] [2021-10-21 19:58:00,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:00,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:00,588 INFO L87 Difference]: Start difference. First operand 143 states and 213 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:02,911 INFO L93 Difference]: Finished difference Result 278 states and 416 transitions. [2021-10-21 19:58:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:02,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-10-21 19:58:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:02,912 INFO L225 Difference]: With dead ends: 278 [2021-10-21 19:58:02,913 INFO L226 Difference]: Without dead ends: 156 [2021-10-21 19:58:02,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:02,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-21 19:58:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2021-10-21 19:58:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.4929577464788732) internal successors, (212), 142 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 212 transitions. [2021-10-21 19:58:02,918 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 212 transitions. Word has length 63 [2021-10-21 19:58:02,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:02,919 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 212 transitions. [2021-10-21 19:58:02,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 212 transitions. [2021-10-21 19:58:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-21 19:58:02,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:02,920 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:02,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:58:02,920 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:02,921 INFO L82 PathProgramCache]: Analyzing trace with hash 608502701, now seen corresponding path program 1 times [2021-10-21 19:58:02,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:02,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034077529] [2021-10-21 19:58:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:02,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:02,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:02,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034077529] [2021-10-21 19:58:02,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034077529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:02,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:02,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:02,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963342858] [2021-10-21 19:58:02,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:02,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:02,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:02,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:02,991 INFO L87 Difference]: Start difference. First operand 143 states and 212 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:05,300 INFO L93 Difference]: Finished difference Result 268 states and 402 transitions. [2021-10-21 19:58:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:05,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-10-21 19:58:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:05,303 INFO L225 Difference]: With dead ends: 268 [2021-10-21 19:58:05,303 INFO L226 Difference]: Without dead ends: 146 [2021-10-21 19:58:05,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:05,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-21 19:58:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2021-10-21 19:58:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.4859154929577465) internal successors, (211), 142 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 211 transitions. [2021-10-21 19:58:05,309 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 211 transitions. Word has length 64 [2021-10-21 19:58:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:05,310 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 211 transitions. [2021-10-21 19:58:05,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 211 transitions. [2021-10-21 19:58:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-21 19:58:05,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:05,312 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:05,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:58:05,312 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:05,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1008654101, now seen corresponding path program 1 times [2021-10-21 19:58:05,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:05,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331325689] [2021-10-21 19:58:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:05,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:05,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:05,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331325689] [2021-10-21 19:58:05,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331325689] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:05,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:05,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:05,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173862304] [2021-10-21 19:58:05,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:05,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:05,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:05,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:05,391 INFO L87 Difference]: Start difference. First operand 143 states and 211 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:07,774 INFO L93 Difference]: Finished difference Result 308 states and 463 transitions. [2021-10-21 19:58:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:07,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-10-21 19:58:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:07,777 INFO L225 Difference]: With dead ends: 308 [2021-10-21 19:58:07,777 INFO L226 Difference]: Without dead ends: 186 [2021-10-21 19:58:07,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-21 19:58:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 165. [2021-10-21 19:58:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5182926829268293) internal successors, (249), 164 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 249 transitions. [2021-10-21 19:58:07,784 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 249 transitions. Word has length 64 [2021-10-21 19:58:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:07,784 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 249 transitions. [2021-10-21 19:58:07,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 249 transitions. [2021-10-21 19:58:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-21 19:58:07,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:07,786 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:07,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:58:07,787 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:07,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:07,787 INFO L82 PathProgramCache]: Analyzing trace with hash -221679590, now seen corresponding path program 1 times [2021-10-21 19:58:07,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:07,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064072685] [2021-10-21 19:58:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:07,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:07,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:07,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064072685] [2021-10-21 19:58:07,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064072685] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:07,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:07,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:07,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046041741] [2021-10-21 19:58:07,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:07,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:07,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:07,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:07,936 INFO L87 Difference]: Start difference. First operand 165 states and 249 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2021-10-21 19:58:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:10,259 INFO L93 Difference]: Finished difference Result 330 states and 500 transitions. [2021-10-21 19:58:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:10,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 77 [2021-10-21 19:58:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:10,261 INFO L225 Difference]: With dead ends: 330 [2021-10-21 19:58:10,261 INFO L226 Difference]: Without dead ends: 186 [2021-10-21 19:58:10,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-21 19:58:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 165. [2021-10-21 19:58:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5121951219512195) internal successors, (248), 164 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 248 transitions. [2021-10-21 19:58:10,267 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 248 transitions. Word has length 77 [2021-10-21 19:58:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:10,268 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 248 transitions. [2021-10-21 19:58:10,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2021-10-21 19:58:10,268 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 248 transitions. [2021-10-21 19:58:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-21 19:58:10,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:10,273 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:10,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:58:10,274 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:10,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:10,274 INFO L82 PathProgramCache]: Analyzing trace with hash 263571285, now seen corresponding path program 1 times [2021-10-21 19:58:10,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:10,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75549244] [2021-10-21 19:58:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:10,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:10,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:10,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75549244] [2021-10-21 19:58:10,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75549244] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:10,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:10,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:10,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035973715] [2021-10-21 19:58:10,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:10,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:10,370 INFO L87 Difference]: Start difference. First operand 165 states and 248 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:12,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:12,698 INFO L93 Difference]: Finished difference Result 329 states and 497 transitions. [2021-10-21 19:58:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:12,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-10-21 19:58:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:12,701 INFO L225 Difference]: With dead ends: 329 [2021-10-21 19:58:12,701 INFO L226 Difference]: Without dead ends: 185 [2021-10-21 19:58:12,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:12,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-21 19:58:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 165. [2021-10-21 19:58:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5060975609756098) internal successors, (247), 164 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 247 transitions. [2021-10-21 19:58:12,711 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 247 transitions. Word has length 78 [2021-10-21 19:58:12,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:12,711 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 247 transitions. [2021-10-21 19:58:12,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 247 transitions. [2021-10-21 19:58:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-21 19:58:12,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:12,713 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:12,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:58:12,713 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:12,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:12,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1101582057, now seen corresponding path program 1 times [2021-10-21 19:58:12,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:12,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713323259] [2021-10-21 19:58:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:12,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:12,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:12,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713323259] [2021-10-21 19:58:12,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713323259] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:12,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:12,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:12,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820230999] [2021-10-21 19:58:12,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:12,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:12,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:12,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:12,781 INFO L87 Difference]: Start difference. First operand 165 states and 247 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:14,609 INFO L93 Difference]: Finished difference Result 329 states and 495 transitions. [2021-10-21 19:58:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:14,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-10-21 19:58:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:14,612 INFO L225 Difference]: With dead ends: 329 [2021-10-21 19:58:14,612 INFO L226 Difference]: Without dead ends: 185 [2021-10-21 19:58:14,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-21 19:58:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 165. [2021-10-21 19:58:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5) internal successors, (246), 164 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 246 transitions. [2021-10-21 19:58:14,620 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 246 transitions. Word has length 78 [2021-10-21 19:58:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:14,620 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 246 transitions. [2021-10-21 19:58:14,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 246 transitions. [2021-10-21 19:58:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-21 19:58:14,622 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:14,623 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:14,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:58:14,623 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1738854400, now seen corresponding path program 1 times [2021-10-21 19:58:14,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:14,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151920024] [2021-10-21 19:58:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:14,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:14,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:14,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151920024] [2021-10-21 19:58:14,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151920024] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:14,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:14,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:14,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891529825] [2021-10-21 19:58:14,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:14,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:14,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:14,706 INFO L87 Difference]: Start difference. First operand 165 states and 246 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:16,970 INFO L93 Difference]: Finished difference Result 328 states and 492 transitions. [2021-10-21 19:58:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-10-21 19:58:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:16,973 INFO L225 Difference]: With dead ends: 328 [2021-10-21 19:58:16,973 INFO L226 Difference]: Without dead ends: 184 [2021-10-21 19:58:16,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-21 19:58:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 165. [2021-10-21 19:58:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4939024390243902) internal successors, (245), 164 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 245 transitions. [2021-10-21 19:58:16,981 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 245 transitions. Word has length 78 [2021-10-21 19:58:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:16,982 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 245 transitions. [2021-10-21 19:58:16,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 245 transitions. [2021-10-21 19:58:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-21 19:58:16,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:16,983 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:16,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:58:16,984 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:16,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1606764736, now seen corresponding path program 1 times [2021-10-21 19:58:16,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:16,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120560713] [2021-10-21 19:58:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:16,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:17,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:17,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120560713] [2021-10-21 19:58:17,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120560713] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:17,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:17,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:17,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498835152] [2021-10-21 19:58:17,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:17,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:17,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:17,060 INFO L87 Difference]: Start difference. First operand 165 states and 245 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:19,406 INFO L93 Difference]: Finished difference Result 326 states and 488 transitions. [2021-10-21 19:58:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:19,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-10-21 19:58:19,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:19,409 INFO L225 Difference]: With dead ends: 326 [2021-10-21 19:58:19,409 INFO L226 Difference]: Without dead ends: 182 [2021-10-21 19:58:19,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-21 19:58:19,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2021-10-21 19:58:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4878048780487805) internal successors, (244), 164 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 244 transitions. [2021-10-21 19:58:19,415 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 244 transitions. Word has length 78 [2021-10-21 19:58:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:19,415 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 244 transitions. [2021-10-21 19:58:19,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 244 transitions. [2021-10-21 19:58:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-21 19:58:19,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:19,417 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:19,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:58:19,418 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:19,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1666617795, now seen corresponding path program 1 times [2021-10-21 19:58:19,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:19,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257620045] [2021-10-21 19:58:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:19,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:19,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:19,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257620045] [2021-10-21 19:58:19,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257620045] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:19,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:19,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:19,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659234670] [2021-10-21 19:58:19,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:19,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:19,482 INFO L87 Difference]: Start difference. First operand 165 states and 244 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:21,781 INFO L93 Difference]: Finished difference Result 326 states and 486 transitions. [2021-10-21 19:58:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:21,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-10-21 19:58:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:21,784 INFO L225 Difference]: With dead ends: 326 [2021-10-21 19:58:21,784 INFO L226 Difference]: Without dead ends: 182 [2021-10-21 19:58:21,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-21 19:58:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2021-10-21 19:58:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 243 transitions. [2021-10-21 19:58:21,792 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 243 transitions. Word has length 79 [2021-10-21 19:58:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:21,792 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 243 transitions. [2021-10-21 19:58:21,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 243 transitions. [2021-10-21 19:58:21,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-21 19:58:21,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:21,794 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:21,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:58:21,794 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:21,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1964059694, now seen corresponding path program 1 times [2021-10-21 19:58:21,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:21,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643553284] [2021-10-21 19:58:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:21,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:21,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:21,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643553284] [2021-10-21 19:58:21,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643553284] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:21,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:21,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:21,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788160420] [2021-10-21 19:58:21,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:21,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:21,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:21,900 INFO L87 Difference]: Start difference. First operand 165 states and 243 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:24,217 INFO L93 Difference]: Finished difference Result 326 states and 484 transitions. [2021-10-21 19:58:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:24,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-10-21 19:58:24,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:24,219 INFO L225 Difference]: With dead ends: 326 [2021-10-21 19:58:24,220 INFO L226 Difference]: Without dead ends: 182 [2021-10-21 19:58:24,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-21 19:58:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2021-10-21 19:58:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.475609756097561) internal successors, (242), 164 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 242 transitions. [2021-10-21 19:58:24,226 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 242 transitions. Word has length 80 [2021-10-21 19:58:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:24,227 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 242 transitions. [2021-10-21 19:58:24,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 242 transitions. [2021-10-21 19:58:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-21 19:58:24,228 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:24,228 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:24,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:58:24,228 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:24,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1738940120, now seen corresponding path program 1 times [2021-10-21 19:58:24,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:24,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122781072] [2021-10-21 19:58:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:24,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:24,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:24,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122781072] [2021-10-21 19:58:24,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122781072] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:24,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:24,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:24,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476745729] [2021-10-21 19:58:24,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:24,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:24,295 INFO L87 Difference]: Start difference. First operand 165 states and 242 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:26,548 INFO L93 Difference]: Finished difference Result 316 states and 469 transitions. [2021-10-21 19:58:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:26,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-10-21 19:58:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:26,550 INFO L225 Difference]: With dead ends: 316 [2021-10-21 19:58:26,550 INFO L226 Difference]: Without dead ends: 172 [2021-10-21 19:58:26,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:26,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-21 19:58:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2021-10-21 19:58:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4695121951219512) internal successors, (241), 164 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2021-10-21 19:58:26,556 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 81 [2021-10-21 19:58:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:26,557 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2021-10-21 19:58:26,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2021-10-21 19:58:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-21 19:58:26,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:26,558 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:26,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 19:58:26,559 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:26,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:26,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1548644719, now seen corresponding path program 1 times [2021-10-21 19:58:26,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:26,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174945481] [2021-10-21 19:58:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:26,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:26,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:26,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174945481] [2021-10-21 19:58:26,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174945481] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:26,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:26,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:26,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118384511] [2021-10-21 19:58:26,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:26,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:26,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:26,648 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:29,064 INFO L93 Difference]: Finished difference Result 405 states and 606 transitions. [2021-10-21 19:58:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:29,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-10-21 19:58:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:29,067 INFO L225 Difference]: With dead ends: 405 [2021-10-21 19:58:29,067 INFO L226 Difference]: Without dead ends: 261 [2021-10-21 19:58:29,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-10-21 19:58:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 208. [2021-10-21 19:58:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.541062801932367) internal successors, (319), 207 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 319 transitions. [2021-10-21 19:58:29,075 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 319 transitions. Word has length 86 [2021-10-21 19:58:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:29,076 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 319 transitions. [2021-10-21 19:58:29,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 319 transitions. [2021-10-21 19:58:29,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-21 19:58:29,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:29,077 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:29,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 19:58:29,078 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:29,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:29,078 INFO L82 PathProgramCache]: Analyzing trace with hash 651251441, now seen corresponding path program 1 times [2021-10-21 19:58:29,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:29,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428634517] [2021-10-21 19:58:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:29,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:29,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:29,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428634517] [2021-10-21 19:58:29,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428634517] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:29,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:29,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:29,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948517594] [2021-10-21 19:58:29,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:29,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:29,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:29,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:29,149 INFO L87 Difference]: Start difference. First operand 208 states and 319 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:31,535 INFO L93 Difference]: Finished difference Result 444 states and 688 transitions. [2021-10-21 19:58:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:31,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-10-21 19:58:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:31,537 INFO L225 Difference]: With dead ends: 444 [2021-10-21 19:58:31,538 INFO L226 Difference]: Without dead ends: 257 [2021-10-21 19:58:31,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-10-21 19:58:31,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 232. [2021-10-21 19:58:31,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.5627705627705628) internal successors, (361), 231 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 361 transitions. [2021-10-21 19:58:31,546 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 361 transitions. Word has length 86 [2021-10-21 19:58:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:31,547 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 361 transitions. [2021-10-21 19:58:31,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 361 transitions. [2021-10-21 19:58:31,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-21 19:58:31,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:31,549 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:31,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 19:58:31,550 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:31,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:31,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1438844928, now seen corresponding path program 1 times [2021-10-21 19:58:31,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:31,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210231209] [2021-10-21 19:58:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:31,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:31,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:31,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210231209] [2021-10-21 19:58:31,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210231209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:31,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:31,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:31,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899498404] [2021-10-21 19:58:31,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:31,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:31,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:31,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:31,620 INFO L87 Difference]: Start difference. First operand 232 states and 361 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:34,029 INFO L93 Difference]: Finished difference Result 496 states and 767 transitions. [2021-10-21 19:58:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:34,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-10-21 19:58:34,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:34,034 INFO L225 Difference]: With dead ends: 496 [2021-10-21 19:58:34,035 INFO L226 Difference]: Without dead ends: 285 [2021-10-21 19:58:34,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:34,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-10-21 19:58:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 232. [2021-10-21 19:58:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.5584415584415585) internal successors, (360), 231 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 360 transitions. [2021-10-21 19:58:34,046 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 360 transitions. Word has length 99 [2021-10-21 19:58:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:34,046 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 360 transitions. [2021-10-21 19:58:34,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 360 transitions. [2021-10-21 19:58:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-21 19:58:34,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:34,048 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:34,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-21 19:58:34,049 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:34,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1398170178, now seen corresponding path program 1 times [2021-10-21 19:58:34,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:34,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113515365] [2021-10-21 19:58:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:34,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:34,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:34,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113515365] [2021-10-21 19:58:34,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113515365] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:34,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:34,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:34,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574214963] [2021-10-21 19:58:34,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:34,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:34,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:34,145 INFO L87 Difference]: Start difference. First operand 232 states and 360 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:35,792 INFO L93 Difference]: Finished difference Result 468 states and 727 transitions. [2021-10-21 19:58:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:35,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-10-21 19:58:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:35,795 INFO L225 Difference]: With dead ends: 468 [2021-10-21 19:58:35,795 INFO L226 Difference]: Without dead ends: 257 [2021-10-21 19:58:35,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:35,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-10-21 19:58:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 232. [2021-10-21 19:58:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.5541125541125542) internal successors, (359), 231 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 359 transitions. [2021-10-21 19:58:35,803 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 359 transitions. Word has length 99 [2021-10-21 19:58:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:35,803 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 359 transitions. [2021-10-21 19:58:35,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 359 transitions. [2021-10-21 19:58:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 19:58:35,805 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:35,805 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:35,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-21 19:58:35,806 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:35,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:35,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1186151471, now seen corresponding path program 1 times [2021-10-21 19:58:35,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:35,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745961406] [2021-10-21 19:58:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:35,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:35,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:35,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745961406] [2021-10-21 19:58:35,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745961406] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:35,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:35,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:35,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966823871] [2021-10-21 19:58:35,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:35,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:35,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:35,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:35,891 INFO L87 Difference]: Start difference. First operand 232 states and 359 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:38,258 INFO L93 Difference]: Finished difference Result 495 states and 762 transitions. [2021-10-21 19:58:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-21 19:58:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:38,260 INFO L225 Difference]: With dead ends: 495 [2021-10-21 19:58:38,260 INFO L226 Difference]: Without dead ends: 284 [2021-10-21 19:58:38,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-21 19:58:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 232. [2021-10-21 19:58:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.5497835497835497) internal successors, (358), 231 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 358 transitions. [2021-10-21 19:58:38,269 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 358 transitions. Word has length 100 [2021-10-21 19:58:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:38,269 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 358 transitions. [2021-10-21 19:58:38,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 358 transitions. [2021-10-21 19:58:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 19:58:38,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:38,271 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:38,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-21 19:58:38,271 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:38,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2024162243, now seen corresponding path program 1 times [2021-10-21 19:58:38,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:38,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353648581] [2021-10-21 19:58:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:38,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 19:58:38,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:38,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353648581] [2021-10-21 19:58:38,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353648581] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:38,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:38,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:58:38,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091263001] [2021-10-21 19:58:38,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:58:38,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:38,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:58:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:38,378 INFO L87 Difference]: Start difference. First operand 232 states and 358 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:42,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:42,834 INFO L93 Difference]: Finished difference Result 464 states and 721 transitions. [2021-10-21 19:58:42,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:58:42,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 100 [2021-10-21 19:58:42,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:42,836 INFO L225 Difference]: With dead ends: 464 [2021-10-21 19:58:42,836 INFO L226 Difference]: Without dead ends: 253 [2021-10-21 19:58:42,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:58:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-10-21 19:58:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2021-10-21 19:58:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5298804780876494) internal successors, (384), 251 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 384 transitions. [2021-10-21 19:58:42,846 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 384 transitions. Word has length 100 [2021-10-21 19:58:42,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:42,847 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 384 transitions. [2021-10-21 19:58:42,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:42,847 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 384 transitions. [2021-10-21 19:58:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 19:58:42,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:42,849 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-10-21 19:58:42,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-21 19:58:42,849 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:42,850 INFO L82 PathProgramCache]: Analyzing trace with hash -816274214, now seen corresponding path program 1 times [2021-10-21 19:58:42,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:42,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777496718] [2021-10-21 19:58:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:42,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:42,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:42,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777496718] [2021-10-21 19:58:42,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777496718] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:42,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:42,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:42,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453673100] [2021-10-21 19:58:42,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:42,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:42,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:42,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:42,920 INFO L87 Difference]: Start difference. First operand 252 states and 384 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:45,305 INFO L93 Difference]: Finished difference Result 534 states and 810 transitions. [2021-10-21 19:58:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:45,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-21 19:58:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:45,309 INFO L225 Difference]: With dead ends: 534 [2021-10-21 19:58:45,309 INFO L226 Difference]: Without dead ends: 303 [2021-10-21 19:58:45,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:45,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-10-21 19:58:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 252. [2021-10-21 19:58:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5258964143426295) internal successors, (383), 251 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 383 transitions. [2021-10-21 19:58:45,320 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 383 transitions. Word has length 100 [2021-10-21 19:58:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:45,320 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 383 transitions. [2021-10-21 19:58:45,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:45,321 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 383 transitions. [2021-10-21 19:58:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 19:58:45,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:45,322 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:45,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-21 19:58:45,323 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1765622374, now seen corresponding path program 1 times [2021-10-21 19:58:45,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:45,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693534617] [2021-10-21 19:58:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:45,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:45,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:45,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693534617] [2021-10-21 19:58:45,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693534617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:45,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:45,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:45,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273690695] [2021-10-21 19:58:45,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:45,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:45,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:45,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:45,394 INFO L87 Difference]: Start difference. First operand 252 states and 383 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:47,791 INFO L93 Difference]: Finished difference Result 532 states and 806 transitions. [2021-10-21 19:58:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-21 19:58:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:47,793 INFO L225 Difference]: With dead ends: 532 [2021-10-21 19:58:47,793 INFO L226 Difference]: Without dead ends: 301 [2021-10-21 19:58:47,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-21 19:58:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 252. [2021-10-21 19:58:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5219123505976095) internal successors, (382), 251 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 382 transitions. [2021-10-21 19:58:47,803 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 382 transitions. Word has length 100 [2021-10-21 19:58:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:47,804 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 382 transitions. [2021-10-21 19:58:47,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 382 transitions. [2021-10-21 19:58:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 19:58:47,805 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:47,805 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-10-21 19:58:47,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-21 19:58:47,806 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash 444643036, now seen corresponding path program 1 times [2021-10-21 19:58:47,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:47,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278623744] [2021-10-21 19:58:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:47,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:47,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:47,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278623744] [2021-10-21 19:58:47,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278623744] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:47,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:47,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:47,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821424407] [2021-10-21 19:58:47,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:47,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:47,875 INFO L87 Difference]: Start difference. First operand 252 states and 382 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:50,206 INFO L93 Difference]: Finished difference Result 506 states and 768 transitions. [2021-10-21 19:58:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:50,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-21 19:58:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:50,209 INFO L225 Difference]: With dead ends: 506 [2021-10-21 19:58:50,209 INFO L226 Difference]: Without dead ends: 275 [2021-10-21 19:58:50,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:50,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-10-21 19:58:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 252. [2021-10-21 19:58:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5179282868525896) internal successors, (381), 251 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 381 transitions. [2021-10-21 19:58:50,219 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 381 transitions. Word has length 100 [2021-10-21 19:58:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:50,219 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 381 transitions. [2021-10-21 19:58:50,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 381 transitions. [2021-10-21 19:58:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 19:58:50,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:50,221 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:50,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-21 19:58:50,221 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:50,222 INFO L82 PathProgramCache]: Analyzing trace with hash -504705124, now seen corresponding path program 1 times [2021-10-21 19:58:50,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:50,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146671768] [2021-10-21 19:58:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:50,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:50,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:50,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146671768] [2021-10-21 19:58:50,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146671768] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:50,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:50,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:50,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159132177] [2021-10-21 19:58:50,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:50,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:50,296 INFO L87 Difference]: Start difference. First operand 252 states and 381 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:52,594 INFO L93 Difference]: Finished difference Result 504 states and 764 transitions. [2021-10-21 19:58:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-21 19:58:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:52,597 INFO L225 Difference]: With dead ends: 504 [2021-10-21 19:58:52,597 INFO L226 Difference]: Without dead ends: 273 [2021-10-21 19:58:52,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-10-21 19:58:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-10-21 19:58:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5139442231075697) internal successors, (380), 251 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 380 transitions. [2021-10-21 19:58:52,606 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 380 transitions. Word has length 100 [2021-10-21 19:58:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:52,607 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 380 transitions. [2021-10-21 19:58:52,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 380 transitions. [2021-10-21 19:58:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-21 19:58:52,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:52,608 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:52,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-21 19:58:52,609 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1074128156, now seen corresponding path program 1 times [2021-10-21 19:58:52,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:52,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960100436] [2021-10-21 19:58:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:52,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:52,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:52,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960100436] [2021-10-21 19:58:52,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960100436] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:52,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:52,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:52,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631991831] [2021-10-21 19:58:52,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:52,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:52,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:52,678 INFO L87 Difference]: Start difference. First operand 252 states and 380 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:55,152 INFO L93 Difference]: Finished difference Result 532 states and 800 transitions. [2021-10-21 19:58:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:55,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-10-21 19:58:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:55,155 INFO L225 Difference]: With dead ends: 532 [2021-10-21 19:58:55,155 INFO L226 Difference]: Without dead ends: 301 [2021-10-21 19:58:55,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-21 19:58:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 252. [2021-10-21 19:58:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5099601593625498) internal successors, (379), 251 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 379 transitions. [2021-10-21 19:58:55,166 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 379 transitions. Word has length 101 [2021-10-21 19:58:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:55,167 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 379 transitions. [2021-10-21 19:58:55,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 379 transitions. [2021-10-21 19:58:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-21 19:58:55,168 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:55,168 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:55,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-21 19:58:55,169 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1507857242, now seen corresponding path program 1 times [2021-10-21 19:58:55,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:55,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653470342] [2021-10-21 19:58:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:55,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:55,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:55,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653470342] [2021-10-21 19:58:55,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653470342] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:55,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:55,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:55,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467791581] [2021-10-21 19:58:55,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:55,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:55,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:55,245 INFO L87 Difference]: Start difference. First operand 252 states and 379 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:57,546 INFO L93 Difference]: Finished difference Result 504 states and 760 transitions. [2021-10-21 19:58:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-10-21 19:58:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:57,549 INFO L225 Difference]: With dead ends: 504 [2021-10-21 19:58:57,549 INFO L226 Difference]: Without dead ends: 273 [2021-10-21 19:58:57,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:57,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-10-21 19:58:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-10-21 19:58:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5059760956175299) internal successors, (378), 251 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 378 transitions. [2021-10-21 19:58:57,561 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 378 transitions. Word has length 101 [2021-10-21 19:58:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:57,561 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 378 transitions. [2021-10-21 19:58:57,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 378 transitions. [2021-10-21 19:58:57,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-21 19:58:57,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:57,563 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:57,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-21 19:58:57,564 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:57,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:57,564 INFO L82 PathProgramCache]: Analyzing trace with hash 416480630, now seen corresponding path program 1 times [2021-10-21 19:58:57,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:57,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544988874] [2021-10-21 19:58:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:57,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:57,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:57,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544988874] [2021-10-21 19:58:57,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544988874] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:57,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:57,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:57,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77708145] [2021-10-21 19:58:57,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:57,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:57,664 INFO L87 Difference]: Start difference. First operand 252 states and 378 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:00,065 INFO L93 Difference]: Finished difference Result 532 states and 796 transitions. [2021-10-21 19:59:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 102 [2021-10-21 19:59:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:00,068 INFO L225 Difference]: With dead ends: 532 [2021-10-21 19:59:00,068 INFO L226 Difference]: Without dead ends: 301 [2021-10-21 19:59:00,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-21 19:59:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 252. [2021-10-21 19:59:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.50199203187251) internal successors, (377), 251 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 377 transitions. [2021-10-21 19:59:00,080 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 377 transitions. Word has length 102 [2021-10-21 19:59:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:00,080 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 377 transitions. [2021-10-21 19:59:00,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 377 transitions. [2021-10-21 19:59:00,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-21 19:59:00,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:00,082 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:00,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-21 19:59:00,082 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:00,083 INFO L82 PathProgramCache]: Analyzing trace with hash 977180408, now seen corresponding path program 1 times [2021-10-21 19:59:00,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:00,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423929646] [2021-10-21 19:59:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:00,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:00,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:00,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423929646] [2021-10-21 19:59:00,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423929646] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:00,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:00,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:00,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904405702] [2021-10-21 19:59:00,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:00,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:00,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:00,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:00,160 INFO L87 Difference]: Start difference. First operand 252 states and 377 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:02,529 INFO L93 Difference]: Finished difference Result 504 states and 756 transitions. [2021-10-21 19:59:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:02,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 102 [2021-10-21 19:59:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:02,531 INFO L225 Difference]: With dead ends: 504 [2021-10-21 19:59:02,531 INFO L226 Difference]: Without dead ends: 273 [2021-10-21 19:59:02,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-10-21 19:59:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-10-21 19:59:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.49800796812749) internal successors, (376), 251 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 376 transitions. [2021-10-21 19:59:02,541 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 376 transitions. Word has length 102 [2021-10-21 19:59:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:02,541 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 376 transitions. [2021-10-21 19:59:02,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 376 transitions. [2021-10-21 19:59:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-21 19:59:02,543 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:02,543 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:02,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-21 19:59:02,543 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:02,544 INFO L82 PathProgramCache]: Analyzing trace with hash 301543159, now seen corresponding path program 1 times [2021-10-21 19:59:02,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:02,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146624687] [2021-10-21 19:59:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:02,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:02,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:02,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146624687] [2021-10-21 19:59:02,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146624687] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:02,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:02,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:02,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550841709] [2021-10-21 19:59:02,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:02,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:02,630 INFO L87 Difference]: Start difference. First operand 252 states and 376 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:05,006 INFO L93 Difference]: Finished difference Result 532 states and 792 transitions. [2021-10-21 19:59:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:05,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-10-21 19:59:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:05,009 INFO L225 Difference]: With dead ends: 532 [2021-10-21 19:59:05,009 INFO L226 Difference]: Without dead ends: 301 [2021-10-21 19:59:05,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-21 19:59:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 252. [2021-10-21 19:59:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.4940239043824701) internal successors, (375), 251 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 375 transitions. [2021-10-21 19:59:05,020 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 375 transitions. Word has length 103 [2021-10-21 19:59:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:05,020 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 375 transitions. [2021-10-21 19:59:05,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 375 transitions. [2021-10-21 19:59:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-21 19:59:05,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:05,022 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:05,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-21 19:59:05,023 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:05,023 INFO L82 PathProgramCache]: Analyzing trace with hash 503367093, now seen corresponding path program 1 times [2021-10-21 19:59:05,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:05,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569980763] [2021-10-21 19:59:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:05,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:05,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:05,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569980763] [2021-10-21 19:59:05,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569980763] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:05,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:05,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:05,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576901072] [2021-10-21 19:59:05,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:05,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:05,098 INFO L87 Difference]: Start difference. First operand 252 states and 375 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:07,471 INFO L93 Difference]: Finished difference Result 504 states and 752 transitions. [2021-10-21 19:59:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-10-21 19:59:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:07,473 INFO L225 Difference]: With dead ends: 504 [2021-10-21 19:59:07,473 INFO L226 Difference]: Without dead ends: 273 [2021-10-21 19:59:07,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:07,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-10-21 19:59:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-10-21 19:59:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.4900398406374502) internal successors, (374), 251 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 374 transitions. [2021-10-21 19:59:07,485 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 374 transitions. Word has length 103 [2021-10-21 19:59:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:07,486 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 374 transitions. [2021-10-21 19:59:07,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 374 transitions. [2021-10-21 19:59:07,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-21 19:59:07,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:07,488 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:07,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-10-21 19:59:07,488 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:07,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:07,489 INFO L82 PathProgramCache]: Analyzing trace with hash -169251791, now seen corresponding path program 1 times [2021-10-21 19:59:07,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:07,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263460748] [2021-10-21 19:59:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:07,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:07,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:07,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263460748] [2021-10-21 19:59:07,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263460748] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:07,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:07,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:07,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37798552] [2021-10-21 19:59:07,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:07,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:07,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:07,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:07,571 INFO L87 Difference]: Start difference. First operand 252 states and 374 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:10,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:10,087 INFO L93 Difference]: Finished difference Result 522 states and 776 transitions. [2021-10-21 19:59:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:10,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-10-21 19:59:10,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:10,090 INFO L225 Difference]: With dead ends: 522 [2021-10-21 19:59:10,090 INFO L226 Difference]: Without dead ends: 291 [2021-10-21 19:59:10,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-21 19:59:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 252. [2021-10-21 19:59:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.4860557768924303) internal successors, (373), 251 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 373 transitions. [2021-10-21 19:59:10,103 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 373 transitions. Word has length 104 [2021-10-21 19:59:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:10,103 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 373 transitions. [2021-10-21 19:59:10,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 373 transitions. [2021-10-21 19:59:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-21 19:59:10,105 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:10,105 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:10,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-21 19:59:10,106 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:10,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1792322867, now seen corresponding path program 1 times [2021-10-21 19:59:10,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:10,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030095825] [2021-10-21 19:59:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:10,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:10,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:10,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030095825] [2021-10-21 19:59:10,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030095825] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:10,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:10,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:10,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920996342] [2021-10-21 19:59:10,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:10,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:10,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:10,186 INFO L87 Difference]: Start difference. First operand 252 states and 373 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:11,679 INFO L93 Difference]: Finished difference Result 494 states and 736 transitions. [2021-10-21 19:59:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-10-21 19:59:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:11,681 INFO L225 Difference]: With dead ends: 494 [2021-10-21 19:59:11,681 INFO L226 Difference]: Without dead ends: 263 [2021-10-21 19:59:11,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-10-21 19:59:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 252. [2021-10-21 19:59:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.4820717131474104) internal successors, (372), 251 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 372 transitions. [2021-10-21 19:59:11,694 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 372 transitions. Word has length 104 [2021-10-21 19:59:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:11,695 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 372 transitions. [2021-10-21 19:59:11,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 372 transitions. [2021-10-21 19:59:11,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-10-21 19:59:11,696 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:11,697 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:59:11,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-10-21 19:59:11,697 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:11,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:11,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1449725251, now seen corresponding path program 1 times [2021-10-21 19:59:11,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:11,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58928413] [2021-10-21 19:59:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:11,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:11,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:11,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58928413] [2021-10-21 19:59:11,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58928413] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:11,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:11,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:11,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362230949] [2021-10-21 19:59:11,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:11,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:11,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:11,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:11,780 INFO L87 Difference]: Start difference. First operand 252 states and 372 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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) [2021-10-21 19:59:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:14,206 INFO L93 Difference]: Finished difference Result 522 states and 772 transitions. [2021-10-21 19:59:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:14,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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 108 [2021-10-21 19:59:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:14,208 INFO L225 Difference]: With dead ends: 522 [2021-10-21 19:59:14,208 INFO L226 Difference]: Without dead ends: 291 [2021-10-21 19:59:14,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:14,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-21 19:59:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 252. [2021-10-21 19:59:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.4780876494023905) internal successors, (371), 251 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 371 transitions. [2021-10-21 19:59:14,220 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 371 transitions. Word has length 108 [2021-10-21 19:59:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:14,221 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 371 transitions. [2021-10-21 19:59:14,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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) [2021-10-21 19:59:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 371 transitions. [2021-10-21 19:59:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-10-21 19:59:14,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:14,223 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:59:14,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-10-21 19:59:14,224 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1159062207, now seen corresponding path program 1 times [2021-10-21 19:59:14,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:14,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16544604] [2021-10-21 19:59:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:14,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-21 19:59:14,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:14,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16544604] [2021-10-21 19:59:14,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16544604] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:14,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:14,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:59:14,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678558474] [2021-10-21 19:59:14,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:59:14,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:14,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:59:14,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:14,304 INFO L87 Difference]: Start difference. First operand 252 states and 371 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:14,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:14,340 INFO L93 Difference]: Finished difference Result 710 states and 1060 transitions. [2021-10-21 19:59:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:59:14,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 108 [2021-10-21 19:59:14,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:14,345 INFO L225 Difference]: With dead ends: 710 [2021-10-21 19:59:14,345 INFO L226 Difference]: Without dead ends: 479 [2021-10-21 19:59:14,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:14,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-10-21 19:59:14,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2021-10-21 19:59:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 1.4832635983263598) internal successors, (709), 478 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 709 transitions. [2021-10-21 19:59:14,365 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 709 transitions. Word has length 108 [2021-10-21 19:59:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:14,365 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 709 transitions. [2021-10-21 19:59:14,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 709 transitions. [2021-10-21 19:59:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-10-21 19:59:14,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:14,368 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:59:14,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-21 19:59:14,368 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:14,369 INFO L82 PathProgramCache]: Analyzing trace with hash -57091519, now seen corresponding path program 1 times [2021-10-21 19:59:14,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:14,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285812880] [2021-10-21 19:59:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:14,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-21 19:59:14,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:14,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285812880] [2021-10-21 19:59:14,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285812880] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:14,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:14,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:59:14,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432554719] [2021-10-21 19:59:14,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:59:14,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:59:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:14,431 INFO L87 Difference]: Start difference. First operand 479 states and 709 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:14,464 INFO L93 Difference]: Finished difference Result 964 states and 1430 transitions. [2021-10-21 19:59:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:59:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-10-21 19:59:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:14,468 INFO L225 Difference]: With dead ends: 964 [2021-10-21 19:59:14,469 INFO L226 Difference]: Without dead ends: 506 [2021-10-21 19:59:14,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:14,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-10-21 19:59:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-10-21 19:59:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.4732673267326732) internal successors, (744), 505 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 744 transitions. [2021-10-21 19:59:14,494 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 744 transitions. Word has length 108 [2021-10-21 19:59:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:14,494 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 744 transitions. [2021-10-21 19:59:14,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 744 transitions. [2021-10-21 19:59:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-10-21 19:59:14,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:14,498 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:59:14,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-10-21 19:59:14,498 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:14,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:14,499 INFO L82 PathProgramCache]: Analyzing trace with hash -643367741, now seen corresponding path program 1 times [2021-10-21 19:59:14,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:14,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430154123] [2021-10-21 19:59:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:14,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-10-21 19:59:14,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:14,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430154123] [2021-10-21 19:59:14,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430154123] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:14,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:14,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:59:14,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551218557] [2021-10-21 19:59:14,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:59:14,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:14,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:59:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:14,556 INFO L87 Difference]: Start difference. First operand 506 states and 744 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:14,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:14,584 INFO L93 Difference]: Finished difference Result 993 states and 1466 transitions. [2021-10-21 19:59:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:59:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 108 [2021-10-21 19:59:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:14,589 INFO L225 Difference]: With dead ends: 993 [2021-10-21 19:59:14,589 INFO L226 Difference]: Without dead ends: 508 [2021-10-21 19:59:14,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-10-21 19:59:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2021-10-21 19:59:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.4714003944773175) internal successors, (746), 507 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 746 transitions. [2021-10-21 19:59:14,633 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 746 transitions. Word has length 108 [2021-10-21 19:59:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:14,633 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 746 transitions. [2021-10-21 19:59:14,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:14,634 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 746 transitions. [2021-10-21 19:59:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-21 19:59:14,635 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:14,636 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:14,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-10-21 19:59:14,636 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:14,637 INFO L82 PathProgramCache]: Analyzing trace with hash 42738551, now seen corresponding path program 1 times [2021-10-21 19:59:14,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:14,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851986861] [2021-10-21 19:59:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:14,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-21 19:59:14,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:14,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851986861] [2021-10-21 19:59:14,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851986861] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:14,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:14,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:59:14,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793255879] [2021-10-21 19:59:14,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:59:14,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:59:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:14,983 INFO L87 Difference]: Start difference. First operand 508 states and 746 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:19,437 INFO L93 Difference]: Finished difference Result 1013 states and 1488 transitions. [2021-10-21 19:59:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:59:19,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-10-21 19:59:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:19,442 INFO L225 Difference]: With dead ends: 1013 [2021-10-21 19:59:19,442 INFO L226 Difference]: Without dead ends: 508 [2021-10-21 19:59:19,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:59:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-10-21 19:59:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2021-10-21 19:59:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.4694280078895463) internal successors, (745), 507 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 745 transitions. [2021-10-21 19:59:19,464 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 745 transitions. Word has length 127 [2021-10-21 19:59:19,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:19,464 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 745 transitions. [2021-10-21 19:59:19,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 745 transitions. [2021-10-21 19:59:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-21 19:59:19,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:19,466 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:19,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-10-21 19:59:19,467 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:19,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:19,468 INFO L82 PathProgramCache]: Analyzing trace with hash -663858055, now seen corresponding path program 1 times [2021-10-21 19:59:19,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:19,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471818928] [2021-10-21 19:59:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:19,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:59:19,809 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:59:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:59:20,221 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:59:20,221 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:59:20,223 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:59:20,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-10-21 19:59:20,237 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:59:20,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:59:20 BoogieIcfgContainer [2021-10-21 19:59:20,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:59:20,470 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:59:20,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:59:20,471 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:59:20,472 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:57:43" (3/4) ... [2021-10-21 19:59:20,482 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:59:20,483 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:59:20,484 INFO L168 Benchmark]: Toolchain (without parser) took 102008.36 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 48.4 MB in the beginning and 105.9 MB in the end (delta: -57.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:59:20,485 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory is still 67.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:59:20,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 951.21 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 48.2 MB in the beginning and 66.1 MB in the end (delta: -17.9 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:20,486 INFO L168 Benchmark]: Boogie Procedure Inliner took 147.79 ms. Allocated memory is still 113.2 MB. Free memory was 66.1 MB in the beginning and 61.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:20,487 INFO L168 Benchmark]: Boogie Preprocessor took 137.32 ms. Allocated memory is still 113.2 MB. Free memory was 61.3 MB in the beginning and 54.3 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:20,487 INFO L168 Benchmark]: RCFGBuilder took 3463.55 ms. Allocated memory is still 113.2 MB. Free memory was 54.3 MB in the beginning and 63.3 MB in the end (delta: -8.9 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:20,489 INFO L168 Benchmark]: TraceAbstraction took 97285.04 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 63.3 MB in the beginning and 105.9 MB in the end (delta: -42.6 MB). Peak memory consumption was 73.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:20,489 INFO L168 Benchmark]: Witness Printer took 12.38 ms. Allocated memory is still 146.8 MB. Free memory is still 105.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:59:20,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory is still 67.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 951.21 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 48.2 MB in the beginning and 66.1 MB in the end (delta: -17.9 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 147.79 ms. Allocated memory is still 113.2 MB. Free memory was 66.1 MB in the beginning and 61.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 137.32 ms. Allocated memory is still 113.2 MB. Free memory was 61.3 MB in the beginning and 54.3 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3463.55 ms. Allocated memory is still 113.2 MB. Free memory was 54.3 MB in the beginning and 63.3 MB in the end (delta: -8.9 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 97285.04 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 63.3 MB in the beginning and 105.9 MB in the end (delta: -42.6 MB). Peak memory consumption was 73.4 MB. Max. memory is 16.1 GB. * Witness Printer took 12.38 ms. Allocated memory is still 146.8 MB. Free memory is still 105.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1734]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 1152. Possible FailurePath: [L1054] static int init = 1; [L1055] static SSL_METHOD SSLv3_server_data ; VAL [init=1, SSLv3_server_data={21:0}] [L1077] SSL *s ; [L1078] int tmp ; [L1082] s = malloc(sizeof(SSL)) [L1083] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1084] s->ctx = malloc(sizeof(SSL_CTX)) [L1085] s->session = malloc(sizeof(SSL_SESSION)) [L1086] s->state = 8464 [L1088] s->info_callback = (void (*) ()) __VERIFIER_nondet_ulong() [L1089] s->options = __VERIFIER_nondet_ulong() [L1090] s->verify_mode = __VERIFIER_nondet_int() [L1091] EXPR s->session [L1091] (s->session)->peer = (struct x509_st*) __VERIFIER_nondet_ulong() [L1092] EXPR s->s3 [L1092] (s->s3)->tmp.cert_request = __VERIFIER_nondet_int() [L1093] EXPR s->s3 [L1093] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1094] EXPR s->s3 [L1094] EXPR (s->s3)->tmp.new_cipher [L1094] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1095] EXPR s->s3 [L1095] EXPR (s->s3)->tmp.new_cipher [L1095] ((s->s3)->tmp.new_cipher)->algo_strength = __VERIFIER_nondet_ulong() [L1096] COND FALSE !(__VERIFIER_nondet_int()) [L1102] s->cert = malloc(sizeof(struct cert_st)) [L1103] EXPR s->cert [L1103] (s->cert)->pkeys[0].privatekey = (struct evp_pkey_st*) __VERIFIER_nondet_ulong() [L1112] BUF_MEM *buf ; [L1113] unsigned long l ; [L1114] unsigned long Time ; [L1115] unsigned long tmp ; [L1116] void (*cb)() ; [L1117] long num1 ; [L1118] int ret ; [L1119] int new_state ; [L1120] int state ; [L1121] int skip ; [L1122] int got_new_session ; [L1123] int tmp___1 = __VERIFIER_nondet_int() ; [L1124] int tmp___2 = __VERIFIER_nondet_int() ; [L1125] int tmp___3 = __VERIFIER_nondet_int() ; [L1126] int tmp___4 = __VERIFIER_nondet_int() ; [L1127] int tmp___5 = __VERIFIER_nondet_int() ; [L1128] int tmp___6 = __VERIFIER_nondet_int() ; [L1129] int tmp___7 ; [L1130] long tmp___8 = __VERIFIER_nondet_long() ; [L1131] int tmp___9 = __VERIFIER_nondet_int() ; [L1132] int tmp___10 = __VERIFIER_nondet_int() ; [L1133] int blastFlag ; [L1137] blastFlag = 0 [L1138] s->hit=__VERIFIER_nondet_int () [L1139] s->state = 8464 [L1140] tmp = __VERIFIER_nondet_int() [L1141] Time = tmp [L1142] cb = (void (*)())((void *)0) [L1143] ret = -1 [L1144] skip = 0 [L1145] got_new_session = 0 [L1146] EXPR s->info_callback VAL [init=1, SSLv3_server_data={21:0}] [L1146] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1147] EXPR s->info_callback [L1147] cb = s->info_callback [L1151] EXPR s->in_handshake [L1151] s->in_handshake += 1 [L1152] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_server_data={21:0}] [L1161] EXPR s->cert VAL [init=1, SSLv3_server_data={21:0}] [L1161] COND FALSE !((unsigned long )s->cert == (unsigned long )((void *)0)) [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={21:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1194] COND TRUE s->state == 8464 [L1354] s->shutdown = 0 [L1355] ret = __VERIFIER_nondet_int() [L1356] COND TRUE blastFlag == 0 [L1357] blastFlag = 1 VAL [init=1, SSLv3_server_data={21:0}] [L1361] COND FALSE !(ret <= 0) [L1366] got_new_session = 1 [L1367] s->state = 8496 [L1368] s->init_num = 0 VAL [init=1, SSLv3_server_data={21:0}] [L1693] EXPR s->s3 [L1693] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={21:0}] [L1693] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1722] skip = 0 VAL [init=1, SSLv3_server_data={21:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={21:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1203] COND TRUE s->state == 8496 [L1372] ret = __VERIFIER_nondet_int() [L1373] COND TRUE blastFlag == 1 [L1374] blastFlag = 2 VAL [init=1, SSLv3_server_data={21:0}] [L1378] COND FALSE !(ret <= 0) [L1383] s->hit VAL [init=1, SSLv3_server_data={21:0}] [L1383] COND TRUE s->hit [L1384] s->state = 8656 VAL [init=1, SSLv3_server_data={21:0}] [L1388] s->init_num = 0 VAL [init=1, SSLv3_server_data={21:0}] [L1693] EXPR s->s3 [L1693] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={21:0}] [L1693] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1722] skip = 0 VAL [init=1, SSLv3_server_data={21:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={21:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1215] COND FALSE !(s->state == 8528) [L1218] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1218] COND FALSE !(s->state == 8529) [L1221] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1221] COND FALSE !(s->state == 8544) [L1224] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1224] COND FALSE !(s->state == 8545) [L1227] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1227] COND FALSE !(s->state == 8560) [L1230] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1230] COND FALSE !(s->state == 8561) [L1233] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1233] COND FALSE !(s->state == 8448) [L1236] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1236] COND FALSE !(s->state == 8576) [L1239] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1239] COND FALSE !(s->state == 8577) [L1242] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1242] COND FALSE !(s->state == 8592) [L1245] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1245] COND FALSE !(s->state == 8593) [L1248] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1248] COND FALSE !(s->state == 8608) [L1251] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1251] COND FALSE !(s->state == 8609) [L1254] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1254] COND FALSE !(s->state == 8640) [L1257] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1257] COND FALSE !(s->state == 8641) [L1260] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1260] COND TRUE s->state == 8656 [L1586] EXPR s->session [L1586] EXPR s->s3 [L1586] EXPR (s->s3)->tmp.new_cipher [L1586] (s->session)->cipher = (s->s3)->tmp.new_cipher [L1587] COND FALSE !(! tmp___9) [L1593] ret = __VERIFIER_nondet_int() [L1594] COND TRUE blastFlag == 2 [L1595] blastFlag = 3 VAL [init=1, SSLv3_server_data={21:0}] [L1599] COND FALSE !(ret <= 0) [L1604] s->state = 8672 [L1605] s->init_num = 0 VAL [init=1, SSLv3_server_data={21:0}] [L1606] COND FALSE !(! tmp___10) VAL [init=1, SSLv3_server_data={21:0}] [L1693] EXPR s->s3 [L1693] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={21:0}] [L1693] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1722] skip = 0 VAL [init=1, SSLv3_server_data={21:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={21:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1215] COND FALSE !(s->state == 8528) [L1218] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1218] COND FALSE !(s->state == 8529) [L1221] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1221] COND FALSE !(s->state == 8544) [L1224] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1224] COND FALSE !(s->state == 8545) [L1227] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1227] COND FALSE !(s->state == 8560) [L1230] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1230] COND FALSE !(s->state == 8561) [L1233] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1233] COND FALSE !(s->state == 8448) [L1236] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1236] COND FALSE !(s->state == 8576) [L1239] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1239] COND FALSE !(s->state == 8577) [L1242] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1242] COND FALSE !(s->state == 8592) [L1245] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1245] COND FALSE !(s->state == 8593) [L1248] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1248] COND FALSE !(s->state == 8608) [L1251] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1251] COND FALSE !(s->state == 8609) [L1254] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1254] COND FALSE !(s->state == 8640) [L1257] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1257] COND FALSE !(s->state == 8641) [L1260] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1260] COND FALSE !(s->state == 8656) [L1263] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1263] COND FALSE !(s->state == 8657) [L1266] EXPR s->state VAL [init=1, SSLv3_server_data={21:0}] [L1266] COND TRUE s->state == 8672 [L1615] ret = __VERIFIER_nondet_int() [L1616] COND TRUE blastFlag == 3 VAL [init=1, SSLv3_server_data={21:0}] [L1734] reach_error() VAL [init=1, SSLv3_server_data={21:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 145 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 96970.2ms, OverallIterations: 42, TraceHistogramMax: 4, EmptinessCheckTime: 97.3ms, AutomataDifference: 91090.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7823 SDtfs, 2119 SDslu, 11520 SDs, 0 SdLazy, 7151 SolverSat, 347 SolverUnsat, 32 SolverUnknown, 0 SolverNotchecked, 86950.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 233 GetRequests, 83 SyntacticMatches, 29 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 729.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=508occurred in iteration=40, InterpolantAutomatonStates: 165, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 458.6ms AutomataMinimizationTime, 41 MinimizatonAttempts, 934 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 326.0ms SsaConstructionTime, 1653.6ms SatisfiabilityAnalysisTime, 2345.4ms InterpolantComputationTime, 3709 NumberOfCodeBlocks, 3709 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 3541 ConstructedInterpolants, 0 QuantifiedInterpolants, 9600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 41 PerfectInterpolantSequences, 1839/1839 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-21 19:59:20,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:59:23,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:59:23,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:59:23,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:59:23,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:59:23,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:59:23,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:59:23,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:59:23,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:59:23,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:59:23,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:59:23,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:59:23,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:59:23,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:59:23,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:59:23,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:59:23,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:59:23,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:59:23,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:59:23,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:59:23,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:59:23,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:59:23,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:59:23,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:59:23,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:59:23,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:59:23,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:59:23,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:59:23,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:59:23,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:59:23,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:59:23,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:59:23,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:59:23,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:59:23,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:59:23,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:59:23,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:59:23,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:59:23,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:59:23,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:59:23,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:59:23,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-21 19:59:23,566 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:59:23,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:59:23,567 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:59:23,567 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:59:23,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:59:23,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:59:23,569 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:59:23,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:59:23,570 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:59:23,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:59:23,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:59:23,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:59:23,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:59:23,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:59:23,571 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:59:23,572 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:59:23,572 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:59:23,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:59:23,572 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:59:23,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:59:23,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:59:23,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:59:23,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:59:23,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:59:23,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:59:23,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:59:23,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:59:23,575 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:59:23,575 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:59:23,576 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:59:23,576 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:59:23,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:59:23,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:59:23,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:59:23,577 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3fe517c51c5e8fb31577c2325f977891c14909f163a953939dc0a15f16ec6d9 [2021-10-21 19:59:24,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:59:24,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:59:24,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:59:24,126 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:59:24,126 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:59:24,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c [2021-10-21 19:59:24,214 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/data/5804f8330/c8e7943691304d6a83800a66f8c59677/FLAGc9a1fe255 [2021-10-21 19:59:25,146 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:59:25,158 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c [2021-10-21 19:59:25,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/data/5804f8330/c8e7943691304d6a83800a66f8c59677/FLAGc9a1fe255 [2021-10-21 19:59:25,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/data/5804f8330/c8e7943691304d6a83800a66f8c59677 [2021-10-21 19:59:25,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:59:25,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:59:25,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:59:25,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:59:25,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:59:25,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:59:25" (1/1) ... [2021-10-21 19:59:25,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428497f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:25, skipping insertion in model container [2021-10-21 19:59:25,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:59:25" (1/1) ... [2021-10-21 19:59:25,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:59:25,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:59:25,966 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c[72493,72506] [2021-10-21 19:59:25,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:59:26,001 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:59:26,213 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/sv-benchmarks/c/openssl/s3_srvr.blast.03.i.cil.c[72493,72506] [2021-10-21 19:59:26,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:59:26,266 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:59:26,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26 WrapperNode [2021-10-21 19:59:26,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:59:26,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:59:26,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:59:26,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:59:26,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (1/1) ... [2021-10-21 19:59:26,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (1/1) ... [2021-10-21 19:59:26,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:59:26,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:59:26,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:59:26,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:59:26,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (1/1) ... [2021-10-21 19:59:26,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (1/1) ... [2021-10-21 19:59:26,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (1/1) ... [2021-10-21 19:59:26,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (1/1) ... [2021-10-21 19:59:26,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (1/1) ... [2021-10-21 19:59:26,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (1/1) ... [2021-10-21 19:59:26,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (1/1) ... [2021-10-21 19:59:26,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:59:26,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:59:26,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:59:26,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:59:26,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (1/1) ... [2021-10-21 19:59:26,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:59:26,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:59:26,724 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:59:26,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:59:26,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:59:26,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:59:26,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:59:26,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-21 19:59:26,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:59:26,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:59:26,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:59:26,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:59:26,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-21 19:59:27,093 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-21 19:59:31,750 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-21 19:59:31,750 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-21 19:59:31,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:59:31,768 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-21 19:59:31,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:59:31 BoogieIcfgContainer [2021-10-21 19:59:31,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:59:31,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:59:31,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:59:31,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:59:31,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:59:25" (1/3) ... [2021-10-21 19:59:31,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc17243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:59:31, skipping insertion in model container [2021-10-21 19:59:31,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:59:26" (2/3) ... [2021-10-21 19:59:31,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc17243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:59:31, skipping insertion in model container [2021-10-21 19:59:31,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:59:31" (3/3) ... [2021-10-21 19:59:31,806 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.03.i.cil.c [2021-10-21 19:59:31,813 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:59:31,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:59:31,887 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:59:31,897 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 [2021-10-21 19:59:31,898 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:59:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:59:31,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:31,938 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:31,939 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:31,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1430119920, now seen corresponding path program 1 times [2021-10-21 19:59:31,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:59:31,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220845213] [2021-10-21 19:59:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:31,974 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:59:31,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:59:31,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:59:32,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:59:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:59:32,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:59:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:59:32,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:59:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:59:33,197 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:59:33,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220845213] [2021-10-21 19:59:33,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220845213] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:33,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:33,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 19:59:33,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966837435] [2021-10-21 19:59:33,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:33,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:59:33,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:33,241 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:33,481 INFO L93 Difference]: Finished difference Result 539 states and 915 transitions. [2021-10-21 19:59:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:33,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-21 19:59:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:33,512 INFO L225 Difference]: With dead ends: 539 [2021-10-21 19:59:33,512 INFO L226 Difference]: Without dead ends: 365 [2021-10-21 19:59:33,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-10-21 19:59:33,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-10-21 19:59:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.521978021978022) internal successors, (554), 364 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 554 transitions. [2021-10-21 19:59:33,625 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 554 transitions. Word has length 47 [2021-10-21 19:59:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:33,626 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 554 transitions. [2021-10-21 19:59:33,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 554 transitions. [2021-10-21 19:59:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-21 19:59:33,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:33,635 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:33,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-21 19:59:33,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:59:33,863 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:33,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:33,864 INFO L82 PathProgramCache]: Analyzing trace with hash -430845807, now seen corresponding path program 1 times [2021-10-21 19:59:33,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:59:33,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638160184] [2021-10-21 19:59:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:33,866 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:59:33,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:59:33,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:59:33,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:59:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:34,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:59:34,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:59:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:59:34,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:59:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:59:35,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:59:35,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638160184] [2021-10-21 19:59:35,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638160184] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:35,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:35,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 19:59:35,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73463256] [2021-10-21 19:59:35,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:35,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:59:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:35,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:35,500 INFO L87 Difference]: Start difference. First operand 365 states and 554 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:35,670 INFO L93 Difference]: Finished difference Result 836 states and 1275 transitions. [2021-10-21 19:59:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:35,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-21 19:59:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:35,676 INFO L225 Difference]: With dead ends: 836 [2021-10-21 19:59:35,676 INFO L226 Difference]: Without dead ends: 600 [2021-10-21 19:59:35,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-10-21 19:59:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2021-10-21 19:59:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.5175292153589315) internal successors, (909), 599 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 909 transitions. [2021-10-21 19:59:35,751 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 909 transitions. Word has length 105 [2021-10-21 19:59:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:35,754 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 909 transitions. [2021-10-21 19:59:35,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 909 transitions. [2021-10-21 19:59:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-21 19:59:35,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:35,773 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:35,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:59:35,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:59:35,990 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:35,991 INFO L82 PathProgramCache]: Analyzing trace with hash 42738551, now seen corresponding path program 1 times [2021-10-21 19:59:35,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:59:35,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004007034] [2021-10-21 19:59:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:35,993 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:59:35,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:59:35,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:59:36,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 19:59:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:36,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:59:36,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:59:36,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:59:36,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:59:36,873 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-10-21 19:59:36,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 22 [2021-10-21 19:59:36,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:59:36,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:59:36,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:59:36,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-10-21 19:59:37,054 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-21 19:59:37,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-10-21 19:59:37,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:59:37,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-21 19:59:37,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-21 19:59:37,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-21 19:59:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-21 19:59:37,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:59:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-21 19:59:38,670 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:59:38,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004007034] [2021-10-21 19:59:38,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004007034] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:38,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:38,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-21 19:59:38,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361143558] [2021-10-21 19:59:38,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:59:38,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:59:38,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:59:38,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:59:38,674 INFO L87 Difference]: Start difference. First operand 600 states and 909 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:51,392 INFO L93 Difference]: Finished difference Result 1197 states and 1814 transitions. [2021-10-21 19:59:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:59:51,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-10-21 19:59:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:51,399 INFO L225 Difference]: With dead ends: 1197 [2021-10-21 19:59:51,399 INFO L226 Difference]: Without dead ends: 600 [2021-10-21 19:59:51,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:59:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-10-21 19:59:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2021-10-21 19:59:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.5158597662771285) internal successors, (908), 599 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 908 transitions. [2021-10-21 19:59:51,425 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 908 transitions. Word has length 127 [2021-10-21 19:59:51,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:51,425 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 908 transitions. [2021-10-21 19:59:51,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 908 transitions. [2021-10-21 19:59:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-21 19:59:51,428 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:51,428 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:51,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:59:51,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:59:51,642 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:51,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash -663858055, now seen corresponding path program 1 times [2021-10-21 19:59:51,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:59:51,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645099574] [2021-10-21 19:59:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:51,645 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:59:51,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:59:51,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:59:51,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 19:59:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:59:52,978 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:59:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:59:54,199 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 19:59:54,200 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:59:54,201 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:59:54,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:59:54,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:59:54,430 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:59:54,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:59:54 BoogieIcfgContainer [2021-10-21 19:59:54,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:59:54,636 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:59:54,636 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:59:54,636 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:59:54,637 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:59:31" (3/4) ... [2021-10-21 19:59:54,639 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:59:54,814 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:59:54,814 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:59:54,816 INFO L168 Benchmark]: Toolchain (without parser) took 29564.78 ms. Allocated memory was 58.7 MB in the beginning and 111.1 MB in the end (delta: 52.4 MB). Free memory was 36.4 MB in the beginning and 31.9 MB in the end (delta: 4.4 MB). Peak memory consumption was 56.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:54,816 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 58.7 MB. Free memory is still 40.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:59:54,817 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1016.18 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 36.2 MB in the beginning and 42.8 MB in the end (delta: -6.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:54,817 INFO L168 Benchmark]: Boogie Procedure Inliner took 187.97 ms. Allocated memory is still 79.7 MB. Free memory was 42.8 MB in the beginning and 38.2 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:54,817 INFO L168 Benchmark]: Boogie Preprocessor took 212.18 ms. Allocated memory is still 79.7 MB. Free memory was 38.0 MB in the beginning and 53.7 MB in the end (delta: -15.8 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:54,818 INFO L168 Benchmark]: RCFGBuilder took 5100.56 ms. Allocated memory is still 79.7 MB. Free memory was 53.7 MB in the beginning and 29.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:54,818 INFO L168 Benchmark]: TraceAbstraction took 22839.28 ms. Allocated memory is still 111.1 MB. Free memory was 86.1 MB in the beginning and 46.7 MB in the end (delta: 39.4 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:54,819 INFO L168 Benchmark]: Witness Printer took 178.86 ms. Allocated memory is still 111.1 MB. Free memory was 46.7 MB in the beginning and 31.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:54,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 58.7 MB. Free memory is still 40.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1016.18 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 36.2 MB in the beginning and 42.8 MB in the end (delta: -6.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 187.97 ms. Allocated memory is still 79.7 MB. Free memory was 42.8 MB in the beginning and 38.2 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 212.18 ms. Allocated memory is still 79.7 MB. Free memory was 38.0 MB in the beginning and 53.7 MB in the end (delta: -15.8 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * RCFGBuilder took 5100.56 ms. Allocated memory is still 79.7 MB. Free memory was 53.7 MB in the beginning and 29.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22839.28 ms. Allocated memory is still 111.1 MB. Free memory was 86.1 MB in the beginning and 46.7 MB in the end (delta: 39.4 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. * Witness Printer took 178.86 ms. Allocated memory is still 111.1 MB. Free memory was 46.7 MB in the beginning and 31.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1734]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1054] static int init = 1; [L1055] static SSL_METHOD SSLv3_server_data ; VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1077] SSL *s ; [L1078] int tmp ; [L1082] s = malloc(sizeof(SSL)) [L1083] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1084] s->ctx = malloc(sizeof(SSL_CTX)) [L1085] s->session = malloc(sizeof(SSL_SESSION)) [L1086] s->state = 8464 [L1088] s->info_callback = (void (*) ()) __VERIFIER_nondet_ulong() [L1089] s->options = __VERIFIER_nondet_ulong() [L1090] s->verify_mode = __VERIFIER_nondet_int() [L1091] EXPR s->session [L1091] (s->session)->peer = (struct x509_st*) __VERIFIER_nondet_ulong() [L1092] EXPR s->s3 [L1092] (s->s3)->tmp.cert_request = __VERIFIER_nondet_int() [L1093] EXPR s->s3 [L1093] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1094] EXPR s->s3 [L1094] EXPR (s->s3)->tmp.new_cipher [L1094] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1095] EXPR s->s3 [L1095] EXPR (s->s3)->tmp.new_cipher [L1095] ((s->s3)->tmp.new_cipher)->algo_strength = __VERIFIER_nondet_ulong() [L1096] COND FALSE !(__VERIFIER_nondet_int()) [L1102] s->cert = malloc(sizeof(struct cert_st)) [L1103] EXPR s->cert [L1103] (s->cert)->pkeys[0].privatekey = (struct evp_pkey_st*) __VERIFIER_nondet_ulong() [L1112] BUF_MEM *buf ; [L1113] unsigned long l ; [L1114] unsigned long Time ; [L1115] unsigned long tmp ; [L1116] void (*cb)() ; [L1117] long num1 ; [L1118] int ret ; [L1119] int new_state ; [L1120] int state ; [L1121] int skip ; [L1122] int got_new_session ; [L1123] int tmp___1 = __VERIFIER_nondet_int() ; [L1124] int tmp___2 = __VERIFIER_nondet_int() ; [L1125] int tmp___3 = __VERIFIER_nondet_int() ; [L1126] int tmp___4 = __VERIFIER_nondet_int() ; [L1127] int tmp___5 = __VERIFIER_nondet_int() ; [L1128] int tmp___6 = __VERIFIER_nondet_int() ; [L1129] int tmp___7 ; [L1130] long tmp___8 = __VERIFIER_nondet_long() ; [L1131] int tmp___9 = __VERIFIER_nondet_int() ; [L1132] int tmp___10 = __VERIFIER_nondet_int() ; [L1133] int blastFlag ; [L1137] blastFlag = 0 [L1138] s->hit=__VERIFIER_nondet_int () [L1139] s->state = 8464 [L1140] tmp = __VERIFIER_nondet_int() [L1141] Time = tmp [L1142] cb = (void (*)())((void *)0) [L1143] ret = -1 [L1144] skip = 0 [L1145] got_new_session = 0 [L1146] EXPR s->info_callback VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1146] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1147] EXPR s->info_callback [L1147] cb = s->info_callback [L1151] EXPR s->in_handshake [L1151] s->in_handshake += 1 [L1152] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1161] EXPR s->cert VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1161] COND FALSE !((unsigned long )s->cert == (unsigned long )((void *)0)) [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1194] COND TRUE s->state == 8464 [L1354] s->shutdown = 0 [L1355] ret = __VERIFIER_nondet_int() [L1356] COND TRUE blastFlag == 0 [L1357] blastFlag = 1 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1361] COND FALSE !(ret <= 0) [L1366] got_new_session = 1 [L1367] s->state = 8496 [L1368] s->init_num = 0 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1693] EXPR s->s3 [L1693] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1693] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1722] skip = 0 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1203] COND TRUE s->state == 8496 [L1372] ret = __VERIFIER_nondet_int() [L1373] COND TRUE blastFlag == 1 [L1374] blastFlag = 2 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1378] COND FALSE !(ret <= 0) [L1383] s->hit VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1383] COND TRUE s->hit [L1384] s->state = 8656 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1388] s->init_num = 0 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1693] EXPR s->s3 [L1693] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1693] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1722] skip = 0 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1215] COND FALSE !(s->state == 8528) [L1218] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1218] COND FALSE !(s->state == 8529) [L1221] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1221] COND FALSE !(s->state == 8544) [L1224] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1224] COND FALSE !(s->state == 8545) [L1227] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1227] COND FALSE !(s->state == 8560) [L1230] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1230] COND FALSE !(s->state == 8561) [L1233] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1233] COND FALSE !(s->state == 8448) [L1236] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1236] COND FALSE !(s->state == 8576) [L1239] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1239] COND FALSE !(s->state == 8577) [L1242] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1242] COND FALSE !(s->state == 8592) [L1245] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1245] COND FALSE !(s->state == 8593) [L1248] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1248] COND FALSE !(s->state == 8608) [L1251] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1251] COND FALSE !(s->state == 8609) [L1254] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1254] COND FALSE !(s->state == 8640) [L1257] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1257] COND FALSE !(s->state == 8641) [L1260] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1260] COND TRUE s->state == 8656 [L1586] EXPR s->session [L1586] EXPR s->s3 [L1586] EXPR (s->s3)->tmp.new_cipher [L1586] (s->session)->cipher = (s->s3)->tmp.new_cipher [L1587] COND FALSE !(! tmp___9) [L1593] ret = __VERIFIER_nondet_int() [L1594] COND TRUE blastFlag == 2 [L1595] blastFlag = 3 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1599] COND FALSE !(ret <= 0) [L1604] s->state = 8672 [L1605] s->init_num = 0 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1606] COND FALSE !(! tmp___10) VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1693] EXPR s->s3 [L1693] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1693] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1722] skip = 0 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1215] COND FALSE !(s->state == 8528) [L1218] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1218] COND FALSE !(s->state == 8529) [L1221] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1221] COND FALSE !(s->state == 8544) [L1224] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1224] COND FALSE !(s->state == 8545) [L1227] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1227] COND FALSE !(s->state == 8560) [L1230] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1230] COND FALSE !(s->state == 8561) [L1233] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1233] COND FALSE !(s->state == 8448) [L1236] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1236] COND FALSE !(s->state == 8576) [L1239] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1239] COND FALSE !(s->state == 8577) [L1242] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1242] COND FALSE !(s->state == 8592) [L1245] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1245] COND FALSE !(s->state == 8593) [L1248] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1248] COND FALSE !(s->state == 8608) [L1251] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1251] COND FALSE !(s->state == 8609) [L1254] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1254] COND FALSE !(s->state == 8640) [L1257] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1257] COND FALSE !(s->state == 8641) [L1260] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1260] COND FALSE !(s->state == 8656) [L1263] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1263] COND FALSE !(s->state == 8657) [L1266] EXPR s->state VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1266] COND TRUE s->state == 8672 [L1615] ret = __VERIFIER_nondet_int() [L1616] COND TRUE blastFlag == 3 VAL [init=1, SSLv3_server_data={-1073741793:0}] [L1734] reach_error() VAL [init=1, SSLv3_server_data={-1073741793:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 145 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22542.6ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 36.4ms, AutomataDifference: 13220.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 790 SDtfs, 665 SDslu, 1476 SDs, 0 SdLazy, 374 SolverSat, 20 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 12269.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 554 GetRequests, 541 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 417.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=600occurred in iteration=2, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 180.4ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 231.2ms SsaConstructionTime, 1640.2ms SatisfiabilityAnalysisTime, 4354.0ms InterpolantComputationTime, 406 NumberOfCodeBlocks, 406 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 552 ConstructedInterpolants, 1 QuantifiedInterpolants, 1163 SizeOfPredicates, 12 NumberOfNonLiveVariables, 792 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 322/322 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:59:54,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a45f8-ba62-485f-b59b-acc242cfce95/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...