./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product33.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6dc52251d8599495e3d1910510992bf3863620ce75312360a12a1bf3bdfb6242 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:22:33,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:22:33,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:22:34,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:22:34,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:22:34,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:22:34,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:22:34,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:22:34,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:22:34,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:22:34,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:22:34,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:22:34,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:22:34,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:22:34,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:22:34,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:22:34,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:22:34,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:22:34,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:22:34,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:22:34,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:22:34,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:22:34,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:22:34,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:22:34,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:22:34,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:22:34,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:22:34,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:22:34,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:22:34,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:22:34,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:22:34,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:22:34,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:22:34,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:22:34,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:22:34,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:22:34,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:22:34,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:22:34,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:22:34,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:22:34,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:22:34,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:22:34,187 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:22:34,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:22:34,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:22:34,189 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:22:34,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:22:34,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:22:34,198 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:22:34,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:22:34,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:22:34,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:22:34,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:22:34,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:22:34,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:22:34,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:22:34,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:22:34,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:22:34,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:22:34,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:22:34,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:22:34,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:22:34,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:22:34,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:22:34,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:22:34,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:22:34,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:22:34,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:22:34,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:22:34,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:22:34,204 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:22:34,204 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:22:34,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:22:34,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:22:34,205 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_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dc52251d8599495e3d1910510992bf3863620ce75312360a12a1bf3bdfb6242 [2021-11-22 15:22:34,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:22:34,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:22:34,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:22:34,639 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:22:34,640 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:22:34,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/product-lines/email_spec9_product33.cil.c [2021-11-22 15:22:34,714 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/data/b12a65778/a0d62f37b29c4a838d5f1c1d9237f20a/FLAG0c1765a9f [2021-11-22 15:22:35,489 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:22:35,490 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/sv-benchmarks/c/product-lines/email_spec9_product33.cil.c [2021-11-22 15:22:35,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/data/b12a65778/a0d62f37b29c4a838d5f1c1d9237f20a/FLAG0c1765a9f [2021-11-22 15:22:35,664 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/data/b12a65778/a0d62f37b29c4a838d5f1c1d9237f20a [2021-11-22 15:22:35,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:22:35,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:22:35,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:22:35,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:22:35,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:22:35,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:22:35" (1/1) ... [2021-11-22 15:22:35,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea8ad2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:35, skipping insertion in model container [2021-11-22 15:22:35,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:22:35" (1/1) ... [2021-11-22 15:22:35,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:22:35,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:22:36,467 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/sv-benchmarks/c/product-lines/email_spec9_product33.cil.c[33566,33579] [2021-11-22 15:22:36,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:22:36,604 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:22:36,700 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/sv-benchmarks/c/product-lines/email_spec9_product33.cil.c[33566,33579] [2021-11-22 15:22:36,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:22:36,837 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:22:36,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36 WrapperNode [2021-11-22 15:22:36,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:22:36,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:22:36,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:22:36,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:22:36,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (1/1) ... [2021-11-22 15:22:36,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (1/1) ... [2021-11-22 15:22:37,130 INFO L137 Inliner]: procedures = 135, calls = 233, calls flagged for inlining = 138, calls inlined = 203, statements flattened = 3080 [2021-11-22 15:22:37,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:22:37,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:22:37,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:22:37,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:22:37,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (1/1) ... [2021-11-22 15:22:37,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (1/1) ... [2021-11-22 15:22:37,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (1/1) ... [2021-11-22 15:22:37,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (1/1) ... [2021-11-22 15:22:37,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (1/1) ... [2021-11-22 15:22:37,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (1/1) ... [2021-11-22 15:22:37,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (1/1) ... [2021-11-22 15:22:37,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:22:37,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:22:37,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:22:37,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:22:37,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (1/1) ... [2021-11-22 15:22:37,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:22:37,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:22:37,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:22:37,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:22:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-22 15:22:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:22:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:22:37,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:22:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:22:37,755 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:22:37,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:22:39,819 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:22:39,847 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:22:39,847 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 15:22:39,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:22:39 BoogieIcfgContainer [2021-11-22 15:22:39,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:22:39,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:22:39,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:22:39,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:22:39,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:22:35" (1/3) ... [2021-11-22 15:22:39,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519762f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:22:39, skipping insertion in model container [2021-11-22 15:22:39,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:36" (2/3) ... [2021-11-22 15:22:39,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519762f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:22:39, skipping insertion in model container [2021-11-22 15:22:39,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:22:39" (3/3) ... [2021-11-22 15:22:39,864 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product33.cil.c [2021-11-22 15:22:39,875 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:22:39,876 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 15:22:39,958 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:22:39,971 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 15:22:39,972 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 15:22:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 649 states, 646 states have (on average 1.6702786377708978) internal successors, (1079), 648 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-22 15:22:40,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:40,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:40,042 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash -628220914, now seen corresponding path program 1 times [2021-11-22 15:22:40,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:40,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555321895] [2021-11-22 15:22:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:40,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:40,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:40,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555321895] [2021-11-22 15:22:40,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555321895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:40,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:40,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:40,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254698804] [2021-11-22 15:22:40,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:40,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:40,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:40,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:40,592 INFO L87 Difference]: Start difference. First operand has 649 states, 646 states have (on average 1.6702786377708978) internal successors, (1079), 648 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:40,916 INFO L93 Difference]: Finished difference Result 1902 states and 3169 transitions. [2021-11-22 15:22:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:40,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-22 15:22:40,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:40,956 INFO L225 Difference]: With dead ends: 1902 [2021-11-22 15:22:40,957 INFO L226 Difference]: Without dead ends: 989 [2021-11-22 15:22:40,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:40,981 INFO L933 BasicCegarLoop]: 2105 mSDtfsCounter, 1048 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 3148 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:40,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 3148 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:22:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-11-22 15:22:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 505. [2021-11-22 15:22:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.6819085487077534) internal successors, (846), 504 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 846 transitions. [2021-11-22 15:22:41,119 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 846 transitions. Word has length 52 [2021-11-22 15:22:41,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:41,120 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 846 transitions. [2021-11-22 15:22:41,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 846 transitions. [2021-11-22 15:22:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 15:22:41,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:41,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:41,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:22:41,135 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:41,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1628896065, now seen corresponding path program 1 times [2021-11-22 15:22:41,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070774754] [2021-11-22 15:22:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:41,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:41,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:41,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070774754] [2021-11-22 15:22:41,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070774754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:41,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:41,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:22:41,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894069190] [2021-11-22 15:22:41,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:41,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:22:41,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:41,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:22:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:22:41,349 INFO L87 Difference]: Start difference. First operand 505 states and 846 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:41,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:41,580 INFO L93 Difference]: Finished difference Result 1456 states and 2446 transitions. [2021-11-22 15:22:41,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:22:41,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-22 15:22:41,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:41,589 INFO L225 Difference]: With dead ends: 1456 [2021-11-22 15:22:41,589 INFO L226 Difference]: Without dead ends: 974 [2021-11-22 15:22:41,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:22:41,593 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 1646 mSDsluCounter, 2392 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 3992 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:41,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1646 Valid, 3992 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:22:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-22 15:22:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 505. [2021-11-22 15:22:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.679920477137177) internal successors, (845), 504 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 845 transitions. [2021-11-22 15:22:41,632 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 845 transitions. Word has length 54 [2021-11-22 15:22:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:41,632 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 845 transitions. [2021-11-22 15:22:41,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 845 transitions. [2021-11-22 15:22:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-22 15:22:41,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:41,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:41,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:22:41,637 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash 468547908, now seen corresponding path program 1 times [2021-11-22 15:22:41,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:41,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975699443] [2021-11-22 15:22:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:41,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:41,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975699443] [2021-11-22 15:22:41,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975699443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:41,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:41,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:41,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106457668] [2021-11-22 15:22:41,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:41,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:41,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:41,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:41,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:41,721 INFO L87 Difference]: Start difference. First operand 505 states and 845 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:41,788 INFO L93 Difference]: Finished difference Result 989 states and 1661 transitions. [2021-11-22 15:22:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:41,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-22 15:22:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:41,795 INFO L225 Difference]: With dead ends: 989 [2021-11-22 15:22:41,795 INFO L226 Difference]: Without dead ends: 512 [2021-11-22 15:22:41,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:41,804 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 818 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:41,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 871 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:41,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-22 15:22:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 505. [2021-11-22 15:22:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.6739562624254474) internal successors, (842), 504 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 842 transitions. [2021-11-22 15:22:41,841 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 842 transitions. Word has length 55 [2021-11-22 15:22:41,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:41,842 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 842 transitions. [2021-11-22 15:22:41,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:41,843 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 842 transitions. [2021-11-22 15:22:41,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 15:22:41,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:41,844 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:41,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:22:41,846 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash -815618519, now seen corresponding path program 1 times [2021-11-22 15:22:41,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:41,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486456891] [2021-11-22 15:22:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:41,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:41,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:41,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486456891] [2021-11-22 15:22:41,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486456891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:41,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:41,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:22:41,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026036049] [2021-11-22 15:22:41,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:41,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:22:41,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:22:41,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:22:41,989 INFO L87 Difference]: Start difference. First operand 505 states and 842 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:42,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:42,220 INFO L93 Difference]: Finished difference Result 1443 states and 2423 transitions. [2021-11-22 15:22:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:22:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-22 15:22:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:42,230 INFO L225 Difference]: With dead ends: 1443 [2021-11-22 15:22:42,230 INFO L226 Difference]: Without dead ends: 971 [2021-11-22 15:22:42,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:22:42,243 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 3961 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3961 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:42,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3961 Valid, 1665 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:22:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-11-22 15:22:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 505. [2021-11-22 15:22:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.6719681908548707) internal successors, (841), 504 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 841 transitions. [2021-11-22 15:22:42,295 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 841 transitions. Word has length 57 [2021-11-22 15:22:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:42,297 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 841 transitions. [2021-11-22 15:22:42,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 841 transitions. [2021-11-22 15:22:42,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-22 15:22:42,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:42,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:42,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:22:42,301 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:42,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:42,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1493710042, now seen corresponding path program 1 times [2021-11-22 15:22:42,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:42,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681647648] [2021-11-22 15:22:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:42,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:42,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:42,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681647648] [2021-11-22 15:22:42,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681647648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:42,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:42,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:22:42,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209577528] [2021-11-22 15:22:42,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:42,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:22:42,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:42,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:22:42,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:22:42,422 INFO L87 Difference]: Start difference. First operand 505 states and 841 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:42,655 INFO L93 Difference]: Finished difference Result 1450 states and 2429 transitions. [2021-11-22 15:22:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:22:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-22 15:22:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:42,663 INFO L225 Difference]: With dead ends: 1450 [2021-11-22 15:22:42,663 INFO L226 Difference]: Without dead ends: 978 [2021-11-22 15:22:42,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:22:42,666 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 3965 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3965 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:42,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3965 Valid, 1668 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:22:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-22 15:22:42,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 505. [2021-11-22 15:22:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.6699801192842942) internal successors, (840), 504 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 840 transitions. [2021-11-22 15:22:42,715 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 840 transitions. Word has length 58 [2021-11-22 15:22:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:42,716 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 840 transitions. [2021-11-22 15:22:42,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 840 transitions. [2021-11-22 15:22:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-22 15:22:42,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:42,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:42,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:22:42,724 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:42,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:42,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1392133212, now seen corresponding path program 1 times [2021-11-22 15:22:42,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:42,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122908964] [2021-11-22 15:22:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:42,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:42,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:42,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122908964] [2021-11-22 15:22:42,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122908964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:42,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:42,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:42,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267414221] [2021-11-22 15:22:42,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:42,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:42,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:42,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:42,823 INFO L87 Difference]: Start difference. First operand 505 states and 840 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:42,881 INFO L93 Difference]: Finished difference Result 750 states and 1231 transitions. [2021-11-22 15:22:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:42,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-22 15:22:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:42,887 INFO L225 Difference]: With dead ends: 750 [2021-11-22 15:22:42,887 INFO L226 Difference]: Without dead ends: 508 [2021-11-22 15:22:42,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:42,890 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 1 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:42,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1674 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-22 15:22:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 507. [2021-11-22 15:22:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 505 states have (on average 1.6673267326732673) internal successors, (842), 506 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 842 transitions. [2021-11-22 15:22:42,963 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 842 transitions. Word has length 59 [2021-11-22 15:22:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:42,967 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 842 transitions. [2021-11-22 15:22:42,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 842 transitions. [2021-11-22 15:22:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-22 15:22:42,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:42,969 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:42,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:22:42,969 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1383243817, now seen corresponding path program 1 times [2021-11-22 15:22:42,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:42,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923538044] [2021-11-22 15:22:42,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:42,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:43,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:43,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923538044] [2021-11-22 15:22:43,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923538044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:43,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:43,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:43,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963359133] [2021-11-22 15:22:43,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:43,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:43,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:43,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:43,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:43,049 INFO L87 Difference]: Start difference. First operand 507 states and 842 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:43,140 INFO L93 Difference]: Finished difference Result 1393 states and 2336 transitions. [2021-11-22 15:22:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:43,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-22 15:22:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:43,149 INFO L225 Difference]: With dead ends: 1393 [2021-11-22 15:22:43,150 INFO L226 Difference]: Without dead ends: 924 [2021-11-22 15:22:43,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:43,153 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 790 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:43,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 1580 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-11-22 15:22:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 682. [2021-11-22 15:22:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 680 states have (on average 1.6955882352941176) internal successors, (1153), 681 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1153 transitions. [2021-11-22 15:22:43,228 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1153 transitions. Word has length 68 [2021-11-22 15:22:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:43,229 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1153 transitions. [2021-11-22 15:22:43,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1153 transitions. [2021-11-22 15:22:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 15:22:43,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:43,231 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:43,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:22:43,232 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:43,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1183280265, now seen corresponding path program 1 times [2021-11-22 15:22:43,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:43,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744503283] [2021-11-22 15:22:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:43,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:43,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:43,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744503283] [2021-11-22 15:22:43,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744503283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:43,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:43,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:22:43,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293176421] [2021-11-22 15:22:43,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:43,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:22:43,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:43,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:22:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:22:43,328 INFO L87 Difference]: Start difference. First operand 682 states and 1153 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:43,637 INFO L93 Difference]: Finished difference Result 1960 states and 3349 transitions. [2021-11-22 15:22:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:22:43,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-22 15:22:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:43,649 INFO L225 Difference]: With dead ends: 1960 [2021-11-22 15:22:43,649 INFO L226 Difference]: Without dead ends: 1316 [2021-11-22 15:22:43,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:22:43,652 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 1615 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 4007 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:43,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1615 Valid, 4007 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:22:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-11-22 15:22:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 682. [2021-11-22 15:22:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 680 states have (on average 1.6926470588235294) internal successors, (1151), 681 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1151 transitions. [2021-11-22 15:22:43,754 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1151 transitions. Word has length 69 [2021-11-22 15:22:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:43,755 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1151 transitions. [2021-11-22 15:22:43,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1151 transitions. [2021-11-22 15:22:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 15:22:43,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:43,758 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:43,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 15:22:43,760 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:43,761 INFO L85 PathProgramCache]: Analyzing trace with hash -835902146, now seen corresponding path program 1 times [2021-11-22 15:22:43,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:43,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651933824] [2021-11-22 15:22:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:43,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:43,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651933824] [2021-11-22 15:22:43,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651933824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:43,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:43,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:43,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908484538] [2021-11-22 15:22:43,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:43,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:43,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:43,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:43,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:43,830 INFO L87 Difference]: Start difference. First operand 682 states and 1151 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:43,990 INFO L93 Difference]: Finished difference Result 1958 states and 3341 transitions. [2021-11-22 15:22:43,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:43,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-22 15:22:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:44,002 INFO L225 Difference]: With dead ends: 1958 [2021-11-22 15:22:44,002 INFO L226 Difference]: Without dead ends: 1314 [2021-11-22 15:22:44,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:44,009 INFO L933 BasicCegarLoop]: 1226 mSDtfsCounter, 787 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:44,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 2053 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-11-22 15:22:44,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1072. [2021-11-22 15:22:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1070 states have (on average 1.7271028037383178) internal successors, (1848), 1071 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1848 transitions. [2021-11-22 15:22:44,118 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1848 transitions. Word has length 70 [2021-11-22 15:22:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:44,118 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1848 transitions. [2021-11-22 15:22:44,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1848 transitions. [2021-11-22 15:22:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 15:22:44,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:44,128 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:44,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 15:22:44,128 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:44,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash 202212957, now seen corresponding path program 1 times [2021-11-22 15:22:44,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:44,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412589417] [2021-11-22 15:22:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:44,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:44,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:44,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412589417] [2021-11-22 15:22:44,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412589417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:22:44,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157804823] [2021-11-22 15:22:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:44,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:22:44,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:22:44,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:22:44,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:22:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:44,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:22:44,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:22:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:22:44,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:22:44,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157804823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:44,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:22:44,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-22 15:22:44,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527940366] [2021-11-22 15:22:44,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:44,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:44,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:22:44,805 INFO L87 Difference]: Start difference. First operand 1072 states and 1848 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:44,904 INFO L93 Difference]: Finished difference Result 1259 states and 2144 transitions. [2021-11-22 15:22:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 0 states have call successors, (0), 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 70 [2021-11-22 15:22:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:44,914 INFO L225 Difference]: With dead ends: 1259 [2021-11-22 15:22:44,914 INFO L226 Difference]: Without dead ends: 1066 [2021-11-22 15:22:44,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:22:44,916 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 480 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:44,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 1113 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-11-22 15:22:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1066. [2021-11-22 15:22:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 1.7267605633802816) internal successors, (1839), 1065 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1839 transitions. [2021-11-22 15:22:45,021 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1839 transitions. Word has length 70 [2021-11-22 15:22:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:45,021 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1839 transitions. [2021-11-22 15:22:45,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:45,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1839 transitions. [2021-11-22 15:22:45,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-22 15:22:45,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:45,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:45,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:22:45,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 15:22:45,242 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:45,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1837004910, now seen corresponding path program 1 times [2021-11-22 15:22:45,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:45,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369534380] [2021-11-22 15:22:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:45,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:45,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:45,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369534380] [2021-11-22 15:22:45,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369534380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:22:45,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58649858] [2021-11-22 15:22:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:45,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:22:45,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:22:45,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:22:45,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:22:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:45,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:22:45,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:22:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:45,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:22:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:46,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58649858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:22:46,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:22:46,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 15:22:46,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432445001] [2021-11-22 15:22:46,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:22:46,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:22:46,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:46,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:22:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:22:46,319 INFO L87 Difference]: Start difference. First operand 1066 states and 1839 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:46,703 INFO L93 Difference]: Finished difference Result 3658 states and 6291 transitions. [2021-11-22 15:22:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:22:46,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-22 15:22:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:46,729 INFO L225 Difference]: With dead ends: 3658 [2021-11-22 15:22:46,729 INFO L226 Difference]: Without dead ends: 3422 [2021-11-22 15:22:46,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:22:46,732 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 2337 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2337 SdHoareTripleChecker+Valid, 4132 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:46,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2337 Valid, 4132 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-11-22 15:22:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2714. [2021-11-22 15:22:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 1.7574640619240693) internal successors, (4768), 2713 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 4768 transitions. [2021-11-22 15:22:47,015 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 4768 transitions. Word has length 123 [2021-11-22 15:22:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:47,016 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 4768 transitions. [2021-11-22 15:22:47,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 4768 transitions. [2021-11-22 15:22:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-22 15:22:47,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:47,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:47,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:22:47,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81a8b030-dc4f-4ce9-a199-c33cd111d32e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-22 15:22:47,240 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:47,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:47,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1906090148, now seen corresponding path program 1 times [2021-11-22 15:22:47,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:47,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581893559] [2021-11-22 15:22:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:47,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:47,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:47,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581893559] [2021-11-22 15:22:47,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581893559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:47,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:47,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:47,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421572550] [2021-11-22 15:22:47,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:47,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:47,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:47,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:47,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:47,330 INFO L87 Difference]: Start difference. First operand 2714 states and 4768 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:47,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:47,783 INFO L93 Difference]: Finished difference Result 7066 states and 12442 transitions. [2021-11-22 15:22:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:47,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-22 15:22:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:47,822 INFO L225 Difference]: With dead ends: 7066 [2021-11-22 15:22:47,822 INFO L226 Difference]: Without dead ends: 4552 [2021-11-22 15:22:47,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:47,829 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 776 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:47,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 1647 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4552 states. [2021-11-22 15:22:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4552 to 4316. [2021-11-22 15:22:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 4315 states have (on average 1.7638470451911936) internal successors, (7611), 4315 states have internal predecessors, (7611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 7611 transitions. [2021-11-22 15:22:48,295 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 7611 transitions. Word has length 126 [2021-11-22 15:22:48,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:48,295 INFO L470 AbstractCegarLoop]: Abstraction has 4316 states and 7611 transitions. [2021-11-22 15:22:48,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 7611 transitions. [2021-11-22 15:22:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-22 15:22:48,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:48,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:48,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:22:48,313 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:48,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:48,316 INFO L85 PathProgramCache]: Analyzing trace with hash 139484210, now seen corresponding path program 1 times [2021-11-22 15:22:48,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:48,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440924716] [2021-11-22 15:22:48,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:48,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:48,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:48,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440924716] [2021-11-22 15:22:48,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440924716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:48,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:48,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:48,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162209111] [2021-11-22 15:22:48,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:48,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:48,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:48,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:48,411 INFO L87 Difference]: Start difference. First operand 4316 states and 7611 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:48,947 INFO L93 Difference]: Finished difference Result 10530 states and 18569 transitions. [2021-11-22 15:22:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:48,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 [2021-11-22 15:22:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:49,025 INFO L225 Difference]: With dead ends: 10530 [2021-11-22 15:22:49,025 INFO L226 Difference]: Without dead ends: 6781 [2021-11-22 15:22:49,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:49,033 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 774 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:49,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 1598 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6781 states. [2021-11-22 15:22:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6781 to 6545. [2021-11-22 15:22:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6545 states, 6544 states have (on average 1.7631418092909537) internal successors, (11538), 6544 states have internal predecessors, (11538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6545 states to 6545 states and 11538 transitions. [2021-11-22 15:22:49,680 INFO L78 Accepts]: Start accepts. Automaton has 6545 states and 11538 transitions. Word has length 127 [2021-11-22 15:22:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:49,680 INFO L470 AbstractCegarLoop]: Abstraction has 6545 states and 11538 transitions. [2021-11-22 15:22:49,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6545 states and 11538 transitions. [2021-11-22 15:22:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-22 15:22:49,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:49,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:49,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 15:22:49,703 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash 701893334, now seen corresponding path program 1 times [2021-11-22 15:22:49,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:49,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574281834] [2021-11-22 15:22:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:49,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:49,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:49,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574281834] [2021-11-22 15:22:49,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574281834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:49,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:49,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:49,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811310087] [2021-11-22 15:22:49,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:49,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:49,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:49,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:49,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:49,786 INFO L87 Difference]: Start difference. First operand 6545 states and 11538 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:50,675 INFO L93 Difference]: Finished difference Result 15618 states and 27522 transitions. [2021-11-22 15:22:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:50,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-11-22 15:22:50,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:50,712 INFO L225 Difference]: With dead ends: 15618 [2021-11-22 15:22:50,712 INFO L226 Difference]: Without dead ends: 10229 [2021-11-22 15:22:50,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:50,725 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 772 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:50,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 1598 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:50,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10229 states. [2021-11-22 15:22:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10229 to 9993. [2021-11-22 15:22:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9993 states, 9992 states have (on average 1.760408326661329) internal successors, (17590), 9992 states have internal predecessors, (17590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9993 states to 9993 states and 17590 transitions. [2021-11-22 15:22:51,632 INFO L78 Accepts]: Start accepts. Automaton has 9993 states and 17590 transitions. Word has length 128 [2021-11-22 15:22:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:51,633 INFO L470 AbstractCegarLoop]: Abstraction has 9993 states and 17590 transitions. [2021-11-22 15:22:51,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 9993 states and 17590 transitions. [2021-11-22 15:22:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-22 15:22:51,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:51,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:51,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 15:22:51,665 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:51,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1734368318, now seen corresponding path program 1 times [2021-11-22 15:22:51,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:51,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72818232] [2021-11-22 15:22:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:51,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:51,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:51,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72818232] [2021-11-22 15:22:51,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72818232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:51,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:51,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:51,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742104106] [2021-11-22 15:22:51,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:51,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:51,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:51,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:51,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:51,738 INFO L87 Difference]: Start difference. First operand 9993 states and 17590 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:53,036 INFO L93 Difference]: Finished difference Result 24993 states and 44078 transitions. [2021-11-22 15:22:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:53,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-11-22 15:22:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:53,099 INFO L225 Difference]: With dead ends: 24993 [2021-11-22 15:22:53,099 INFO L226 Difference]: Without dead ends: 16704 [2021-11-22 15:22:53,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:53,119 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 770 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:53,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 1646 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16704 states. [2021-11-22 15:22:54,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16704 to 16468. [2021-11-22 15:22:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16468 states, 16467 states have (on average 1.761462318576547) internal successors, (29006), 16467 states have internal predecessors, (29006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16468 states to 16468 states and 29006 transitions. [2021-11-22 15:22:54,835 INFO L78 Accepts]: Start accepts. Automaton has 16468 states and 29006 transitions. Word has length 129 [2021-11-22 15:22:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:54,835 INFO L470 AbstractCegarLoop]: Abstraction has 16468 states and 29006 transitions. [2021-11-22 15:22:54,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 16468 states and 29006 transitions. [2021-11-22 15:22:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-22 15:22:54,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:54,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:54,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 15:22:54,890 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:54,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:54,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1072501574, now seen corresponding path program 1 times [2021-11-22 15:22:54,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:54,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823434285] [2021-11-22 15:22:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:54,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:54,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:54,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823434285] [2021-11-22 15:22:54,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823434285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:54,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:54,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:54,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266405138] [2021-11-22 15:22:54,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:54,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:54,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:54,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:54,957 INFO L87 Difference]: Start difference. First operand 16468 states and 29006 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:56,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:56,754 INFO L93 Difference]: Finished difference Result 42040 states and 74290 transitions. [2021-11-22 15:22:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:56,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-22 15:22:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:56,874 INFO L225 Difference]: With dead ends: 42040 [2021-11-22 15:22:56,874 INFO L226 Difference]: Without dead ends: 28166 [2021-11-22 15:22:56,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:56,900 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 768 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:56,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 1645 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:22:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28166 states. [2021-11-22 15:22:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28166 to 27930. [2021-11-22 15:22:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27930 states, 27929 states have (on average 1.7642235669017867) internal successors, (49273), 27929 states have internal predecessors, (49273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27930 states to 27930 states and 49273 transitions. [2021-11-22 15:22:59,536 INFO L78 Accepts]: Start accepts. Automaton has 27930 states and 49273 transitions. Word has length 130 [2021-11-22 15:22:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:59,537 INFO L470 AbstractCegarLoop]: Abstraction has 27930 states and 49273 transitions. [2021-11-22 15:22:59,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 27930 states and 49273 transitions. [2021-11-22 15:22:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-22 15:22:59,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:59,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:59,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 15:22:59,668 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:22:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:59,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1332330768, now seen corresponding path program 1 times [2021-11-22 15:22:59,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:22:59,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679856681] [2021-11-22 15:22:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:59,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:22:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:59,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:59,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679856681] [2021-11-22 15:22:59,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679856681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:59,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:59,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:22:59,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785237061] [2021-11-22 15:22:59,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:59,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:59,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:59,742 INFO L87 Difference]: Start difference. First operand 27930 states and 49273 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:02,770 INFO L93 Difference]: Finished difference Result 74395 states and 131460 transitions. [2021-11-22 15:23:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:23:02,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-22 15:23:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:02,965 INFO L225 Difference]: With dead ends: 74395 [2021-11-22 15:23:02,966 INFO L226 Difference]: Without dead ends: 50021 [2021-11-22 15:23:03,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:23:03,010 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 766 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:03,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 1654 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:23:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50021 states. [2021-11-22 15:23:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50021 to 49785. [2021-11-22 15:23:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49785 states, 49784 states have (on average 1.7627551020408163) internal successors, (87757), 49784 states have internal predecessors, (87757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49785 states to 49785 states and 87757 transitions. [2021-11-22 15:23:05,954 INFO L78 Accepts]: Start accepts. Automaton has 49785 states and 87757 transitions. Word has length 131 [2021-11-22 15:23:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:05,957 INFO L470 AbstractCegarLoop]: Abstraction has 49785 states and 87757 transitions. [2021-11-22 15:23:05,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:05,958 INFO L276 IsEmpty]: Start isEmpty. Operand 49785 states and 87757 transitions. [2021-11-22 15:23:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-22 15:23:06,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:06,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:06,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 15:23:06,064 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:23:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:06,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1094735622, now seen corresponding path program 1 times [2021-11-22 15:23:06,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:23:06,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675365683] [2021-11-22 15:23:06,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:06,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:23:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:06,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:23:06,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675365683] [2021-11-22 15:23:06,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675365683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:06,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:06,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:23:06,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641880178] [2021-11-22 15:23:06,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:06,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:23:06,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:23:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:23:06,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:23:06,144 INFO L87 Difference]: Start difference. First operand 49785 states and 87757 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:10,067 INFO L93 Difference]: Finished difference Result 127538 states and 224714 transitions. [2021-11-22 15:23:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:23:10,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-22 15:23:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:10,300 INFO L225 Difference]: With dead ends: 127538 [2021-11-22 15:23:10,300 INFO L226 Difference]: Without dead ends: 83647 [2021-11-22 15:23:10,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:23:10,379 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 764 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:10,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 1598 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:23:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83647 states. [2021-11-22 15:23:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83647 to 83411. [2021-11-22 15:23:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83411 states, 83410 states have (on average 1.75626423690205) internal successors, (146490), 83410 states have internal predecessors, (146490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83411 states to 83411 states and 146490 transitions. [2021-11-22 15:23:15,152 INFO L78 Accepts]: Start accepts. Automaton has 83411 states and 146490 transitions. Word has length 132 [2021-11-22 15:23:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:15,153 INFO L470 AbstractCegarLoop]: Abstraction has 83411 states and 146490 transitions. [2021-11-22 15:23:15,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 83411 states and 146490 transitions. [2021-11-22 15:23:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-22 15:23:15,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:15,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:15,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 15:23:15,271 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:23:15,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2106562766, now seen corresponding path program 1 times [2021-11-22 15:23:15,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:23:15,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960042663] [2021-11-22 15:23:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:15,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:23:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:15,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:23:15,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960042663] [2021-11-22 15:23:15,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960042663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:15,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:15,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:23:15,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641681832] [2021-11-22 15:23:15,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:15,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:23:15,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:23:15,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:23:15,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:23:15,336 INFO L87 Difference]: Start difference. First operand 83411 states and 146490 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:22,253 INFO L93 Difference]: Finished difference Result 229930 states and 404981 transitions. [2021-11-22 15:23:22,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:23:22,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-22 15:23:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:22,629 INFO L225 Difference]: With dead ends: 229930 [2021-11-22 15:23:22,629 INFO L226 Difference]: Without dead ends: 154081 [2021-11-22 15:23:22,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:23:22,724 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 762 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:22,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 1645 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:23:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154081 states. [2021-11-22 15:23:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154081 to 153845. [2021-11-22 15:23:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153845 states, 153844 states have (on average 1.7584826187566627) internal successors, (270532), 153844 states have internal predecessors, (270532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153845 states to 153845 states and 270532 transitions. [2021-11-22 15:23:31,240 INFO L78 Accepts]: Start accepts. Automaton has 153845 states and 270532 transitions. Word has length 133 [2021-11-22 15:23:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:31,240 INFO L470 AbstractCegarLoop]: Abstraction has 153845 states and 270532 transitions. [2021-11-22 15:23:31,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 153845 states and 270532 transitions. [2021-11-22 15:23:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-22 15:23:31,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:31,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:31,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 15:23:31,419 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:23:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:31,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1698278678, now seen corresponding path program 1 times [2021-11-22 15:23:31,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:23:31,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728160328] [2021-11-22 15:23:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:31,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:23:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:31,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:23:31,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728160328] [2021-11-22 15:23:31,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728160328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:31,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:31,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:23:31,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799515645] [2021-11-22 15:23:31,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:31,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:23:31,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:23:31,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:23:31,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:23:31,476 INFO L87 Difference]: Start difference. First operand 153845 states and 270532 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)