./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product25.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_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/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_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/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_262506e9-1026-43fd-9f35-77f506eefc5e/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 4aad45d78970842948dd8f2d4a23b330a7c7a053ef8846b1af27e637f96c3ae7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:03:36,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:03:36,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:03:36,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:03:36,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:03:36,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:03:36,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:03:36,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:03:36,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:03:36,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:03:36,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:03:36,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:03:36,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:03:36,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:03:36,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:03:36,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:03:36,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:03:36,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:03:36,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:03:36,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:03:36,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:03:36,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:03:36,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:03:36,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:03:36,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:03:36,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:03:36,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:03:36,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:03:36,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:03:36,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:03:36,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:03:36,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:03:36,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:03:36,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:03:36,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:03:36,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:03:36,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:03:36,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:03:36,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:03:36,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:03:36,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:03:36,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:03:36,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:03:36,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:03:36,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:03:36,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:03:36,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:03:36,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:03:36,186 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:03:36,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:03:36,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:03:36,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:03:36,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:03:36,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:03:36,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:03:36,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:03:36,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:03:36,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:03:36,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:03:36,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:03:36,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:03:36,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:03:36,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:03:36,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:03:36,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:03:36,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:03:36,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:03:36,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:03:36,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:03:36,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:03:36,191 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:03:36,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:03:36,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:03:36,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:03:36,192 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_262506e9-1026-43fd-9f35-77f506eefc5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4aad45d78970842948dd8f2d4a23b330a7c7a053ef8846b1af27e637f96c3ae7 [2021-11-22 16:03:36,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:03:36,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:03:36,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:03:36,443 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:03:36,444 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:03:36,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/product-lines/email_spec4_product25.cil.c [2021-11-22 16:03:36,507 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/data/59db65afd/4ce00cba52e24967802f69df98d61cf3/FLAGcf28e968e [2021-11-22 16:03:37,217 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:03:37,218 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/sv-benchmarks/c/product-lines/email_spec4_product25.cil.c [2021-11-22 16:03:37,253 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/data/59db65afd/4ce00cba52e24967802f69df98d61cf3/FLAGcf28e968e [2021-11-22 16:03:37,430 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/data/59db65afd/4ce00cba52e24967802f69df98d61cf3 [2021-11-22 16:03:37,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:03:37,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:03:37,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:03:37,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:03:37,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:03:37,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:03:37" (1/1) ... [2021-11-22 16:03:37,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b489a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:37, skipping insertion in model container [2021-11-22 16:03:37,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:03:37" (1/1) ... [2021-11-22 16:03:37,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:03:37,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:03:38,199 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_262506e9-1026-43fd-9f35-77f506eefc5e/sv-benchmarks/c/product-lines/email_spec4_product25.cil.c[63576,63589] [2021-11-22 16:03:38,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:03:38,213 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:03:38,329 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_262506e9-1026-43fd-9f35-77f506eefc5e/sv-benchmarks/c/product-lines/email_spec4_product25.cil.c[63576,63589] [2021-11-22 16:03:38,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:03:38,389 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:03:38,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38 WrapperNode [2021-11-22 16:03:38,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:03:38,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:03:38,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:03:38,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:03:38,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (1/1) ... [2021-11-22 16:03:38,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (1/1) ... [2021-11-22 16:03:38,622 INFO L137 Inliner]: procedures = 130, calls = 218, calls flagged for inlining = 127, calls inlined = 310, statements flattened = 4833 [2021-11-22 16:03:38,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:03:38,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:03:38,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:03:38,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:03:38,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (1/1) ... [2021-11-22 16:03:38,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (1/1) ... [2021-11-22 16:03:38,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (1/1) ... [2021-11-22 16:03:38,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (1/1) ... [2021-11-22 16:03:38,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (1/1) ... [2021-11-22 16:03:38,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (1/1) ... [2021-11-22 16:03:38,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (1/1) ... [2021-11-22 16:03:38,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:03:38,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:03:38,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:03:38,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:03:38,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (1/1) ... [2021-11-22 16:03:38,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:03:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:38,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:03:38,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:03:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-22 16:03:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:03:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:03:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:03:38,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:03:39,158 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:03:39,160 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:03:41,234 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:03:41,250 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:03:41,250 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 16:03:41,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:03:41 BoogieIcfgContainer [2021-11-22 16:03:41,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:03:41,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:03:41,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:03:41,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:03:41,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:03:37" (1/3) ... [2021-11-22 16:03:41,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4f0b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:03:41, skipping insertion in model container [2021-11-22 16:03:41,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:38" (2/3) ... [2021-11-22 16:03:41,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4f0b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:03:41, skipping insertion in model container [2021-11-22 16:03:41,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:03:41" (3/3) ... [2021-11-22 16:03:41,262 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product25.cil.c [2021-11-22 16:03:41,268 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:03:41,268 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-22 16:03:41,324 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:03:41,331 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 16:03:41,331 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-22 16:03:41,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 990 states, 983 states have (on average 1.6744659206510681) internal successors, (1646), 989 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-22 16:03:41,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:41,397 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] [2021-11-22 16:03:41,397 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:41,405 INFO L85 PathProgramCache]: Analyzing trace with hash 593809119, now seen corresponding path program 1 times [2021-11-22 16:03:41,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:41,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746692402] [2021-11-22 16:03:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:41,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:41,824 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 16:03:41,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:41,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746692402] [2021-11-22 16:03:41,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746692402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:41,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:41,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:41,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981160228] [2021-11-22 16:03:41,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:41,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:41,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:41,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:41,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:41,912 INFO L87 Difference]: Start difference. First operand has 990 states, 983 states have (on average 1.6744659206510681) internal successors, (1646), 989 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 16:03:42,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:42,240 INFO L93 Difference]: Finished difference Result 2917 states and 4862 transitions. [2021-11-22 16:03:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:42,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-22 16:03:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:42,280 INFO L225 Difference]: With dead ends: 2917 [2021-11-22 16:03:42,280 INFO L226 Difference]: Without dead ends: 1633 [2021-11-22 16:03:42,291 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 16:03:42,299 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 1607 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 4825 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:42,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1607 Valid, 4825 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:42,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-11-22 16:03:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 827. [2021-11-22 16:03:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 821 states have (on average 1.682095006090134) internal successors, (1381), 826 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 16:03:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1381 transitions. [2021-11-22 16:03:42,463 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1381 transitions. Word has length 50 [2021-11-22 16:03:42,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:42,463 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1381 transitions. [2021-11-22 16:03:42,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 16:03:42,465 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1381 transitions. [2021-11-22 16:03:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-22 16:03:42,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:42,471 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 16:03:42,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:03:42,472 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:42,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1732730614, now seen corresponding path program 1 times [2021-11-22 16:03:42,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:42,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213369839] [2021-11-22 16:03:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:42,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:42,641 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 16:03:42,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:42,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213369839] [2021-11-22 16:03:42,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213369839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:42,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:42,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:03:42,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351961562] [2021-11-22 16:03:42,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:42,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:03:42,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:42,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:03:42,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:42,648 INFO L87 Difference]: Start difference. First operand 827 states and 1381 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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 16:03:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:42,872 INFO L93 Difference]: Finished difference Result 2422 states and 4051 transitions. [2021-11-22 16:03:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:03:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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 16:03:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:42,888 INFO L225 Difference]: With dead ends: 2422 [2021-11-22 16:03:42,888 INFO L226 Difference]: Without dead ends: 1618 [2021-11-22 16:03:42,894 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 16:03:42,896 INFO L933 BasicCegarLoop]: 2670 mSDtfsCounter, 2716 mSDsluCounter, 3997 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2716 SdHoareTripleChecker+Valid, 6667 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 16:03:42,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2716 Valid, 6667 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:42,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-11-22 16:03:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 827. [2021-11-22 16:03:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 821 states have (on average 1.6808769792935445) internal successors, (1380), 826 states have internal predecessors, (1380), 0 states have call successors, (0), 0 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 16:03:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1380 transitions. [2021-11-22 16:03:42,945 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1380 transitions. Word has length 52 [2021-11-22 16:03:42,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:42,946 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1380 transitions. [2021-11-22 16:03:42,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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 16:03:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1380 transitions. [2021-11-22 16:03:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 16:03:42,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:42,952 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] [2021-11-22 16:03:42,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:03:42,955 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash -622169393, now seen corresponding path program 1 times [2021-11-22 16:03:42,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:42,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068606430] [2021-11-22 16:03:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:42,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:43,071 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 16:03:43,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:43,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068606430] [2021-11-22 16:03:43,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068606430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:43,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:43,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:43,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820720589] [2021-11-22 16:03:43,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:43,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:43,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:43,081 INFO L87 Difference]: Start difference. First operand 827 states and 1380 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 16:03:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:43,148 INFO L93 Difference]: Finished difference Result 1633 states and 2731 transitions. [2021-11-22 16:03:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:43,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-22 16:03:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:43,154 INFO L225 Difference]: With dead ends: 1633 [2021-11-22 16:03:43,154 INFO L226 Difference]: Without dead ends: 834 [2021-11-22 16:03:43,156 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 16:03:43,164 INFO L933 BasicCegarLoop]: 1384 mSDtfsCounter, 1353 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 1406 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 16:03:43,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1353 Valid, 1406 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:43,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-22 16:03:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 827. [2021-11-22 16:03:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 821 states have (on average 1.6772228989037758) internal successors, (1377), 826 states have internal predecessors, (1377), 0 states have call successors, (0), 0 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 16:03:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1377 transitions. [2021-11-22 16:03:43,211 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1377 transitions. Word has length 53 [2021-11-22 16:03:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:43,212 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1377 transitions. [2021-11-22 16:03:43,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 16:03:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1377 transitions. [2021-11-22 16:03:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-22 16:03:43,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:43,214 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 16:03:43,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 16:03:43,215 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:43,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash -954231564, now seen corresponding path program 1 times [2021-11-22 16:03:43,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:43,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516485583] [2021-11-22 16:03:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:43,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:43,305 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 16:03:43,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:43,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516485583] [2021-11-22 16:03:43,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516485583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:43,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:43,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:03:43,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788482778] [2021-11-22 16:03:43,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:43,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:03:43,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:43,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:03:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:43,308 INFO L87 Difference]: Start difference. First operand 827 states and 1377 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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 16:03:43,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:43,535 INFO L93 Difference]: Finished difference Result 2409 states and 4028 transitions. [2021-11-22 16:03:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:03:43,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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 16:03:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:43,548 INFO L225 Difference]: With dead ends: 2409 [2021-11-22 16:03:43,549 INFO L226 Difference]: Without dead ends: 1615 [2021-11-22 16:03:43,551 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 16:03:43,560 INFO L933 BasicCegarLoop]: 1361 mSDtfsCounter, 6636 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6636 SdHoareTripleChecker+Valid, 2735 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 16:03:43,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6636 Valid, 2735 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-11-22 16:03:43,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 827. [2021-11-22 16:03:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 821 states have (on average 1.6760048721071863) internal successors, (1376), 826 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 16:03:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1376 transitions. [2021-11-22 16:03:43,626 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1376 transitions. Word has length 55 [2021-11-22 16:03:43,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:43,628 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1376 transitions. [2021-11-22 16:03:43,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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 16:03:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1376 transitions. [2021-11-22 16:03:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-22 16:03:43,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:43,632 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] [2021-11-22 16:03:43,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 16:03:43,632 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1032526821, now seen corresponding path program 1 times [2021-11-22 16:03:43,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:43,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044027743] [2021-11-22 16:03:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:43,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:43,743 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 16:03:43,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:43,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044027743] [2021-11-22 16:03:43,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044027743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:43,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:43,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:03:43,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700600451] [2021-11-22 16:03:43,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:43,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:03:43,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:43,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:03:43,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:43,747 INFO L87 Difference]: Start difference. First operand 827 states and 1376 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 16:03:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:43,980 INFO L93 Difference]: Finished difference Result 2416 states and 4034 transitions. [2021-11-22 16:03:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:03:43,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-22 16:03:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:43,991 INFO L225 Difference]: With dead ends: 2416 [2021-11-22 16:03:43,991 INFO L226 Difference]: Without dead ends: 1622 [2021-11-22 16:03:43,993 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 16:03:43,994 INFO L933 BasicCegarLoop]: 1360 mSDtfsCounter, 6640 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6640 SdHoareTripleChecker+Valid, 2738 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 16:03:43,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6640 Valid, 2738 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-11-22 16:03:44,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 827. [2021-11-22 16:03:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 821 states have (on average 1.6747868453105967) internal successors, (1375), 826 states have internal predecessors, (1375), 0 states have call successors, (0), 0 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 16:03:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1375 transitions. [2021-11-22 16:03:44,051 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1375 transitions. Word has length 56 [2021-11-22 16:03:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:44,052 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1375 transitions. [2021-11-22 16:03:44,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 16:03:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1375 transitions. [2021-11-22 16:03:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 16:03:44,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:44,054 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 16:03:44,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 16:03:44,054 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:44,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1745892049, now seen corresponding path program 1 times [2021-11-22 16:03:44,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:44,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118329898] [2021-11-22 16:03:44,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:44,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:44,104 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 16:03:44,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:44,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118329898] [2021-11-22 16:03:44,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118329898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:44,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:44,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:44,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357969816] [2021-11-22 16:03:44,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:44,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:44,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:44,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:44,107 INFO L87 Difference]: Start difference. First operand 827 states and 1375 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 16:03:44,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:44,175 INFO L93 Difference]: Finished difference Result 1355 states and 2226 transitions. [2021-11-22 16:03:44,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:44,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 16:03:44,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:44,181 INFO L225 Difference]: With dead ends: 1355 [2021-11-22 16:03:44,181 INFO L226 Difference]: Without dead ends: 830 [2021-11-22 16:03:44,182 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 16:03:44,183 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2744 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 16:03:44,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 2744 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:44,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-22 16:03:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 829. [2021-11-22 16:03:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 823 states have (on average 1.6731470230862697) internal successors, (1377), 828 states have internal predecessors, (1377), 0 states have call successors, (0), 0 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 16:03:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1377 transitions. [2021-11-22 16:03:44,236 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1377 transitions. Word has length 57 [2021-11-22 16:03:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:44,237 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1377 transitions. [2021-11-22 16:03:44,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 16:03:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1377 transitions. [2021-11-22 16:03:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-22 16:03:44,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:44,239 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] [2021-11-22 16:03:44,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 16:03:44,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash 899300817, now seen corresponding path program 1 times [2021-11-22 16:03:44,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:44,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481205982] [2021-11-22 16:03:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:44,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:44,284 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 16:03:44,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:44,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481205982] [2021-11-22 16:03:44,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481205982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:44,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:44,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:44,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697542506] [2021-11-22 16:03:44,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:44,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:44,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:44,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:44,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:44,287 INFO L87 Difference]: Start difference. First operand 829 states and 1377 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:44,400 INFO L93 Difference]: Finished difference Result 2359 states and 3941 transitions. [2021-11-22 16:03:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-22 16:03:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:44,412 INFO L225 Difference]: With dead ends: 2359 [2021-11-22 16:03:44,413 INFO L226 Difference]: Without dead ends: 1568 [2021-11-22 16:03:44,414 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 16:03:44,416 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1325 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 2650 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 16:03:44,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1325 Valid, 2650 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-11-22 16:03:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1043. [2021-11-22 16:03:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1037 states have (on average 1.700096432015429) internal successors, (1763), 1042 states have internal predecessors, (1763), 0 states have call successors, (0), 0 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 16:03:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1763 transitions. [2021-11-22 16:03:44,499 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1763 transitions. Word has length 63 [2021-11-22 16:03:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:44,499 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1763 transitions. [2021-11-22 16:03:44,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:44,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1763 transitions. [2021-11-22 16:03:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-22 16:03:44,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:44,501 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] [2021-11-22 16:03:44,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 16:03:44,502 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:44,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1497304637, now seen corresponding path program 1 times [2021-11-22 16:03:44,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:44,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989421839] [2021-11-22 16:03:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:44,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:44,581 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 16:03:44,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:44,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989421839] [2021-11-22 16:03:44,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989421839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:44,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630167991] [2021-11-22 16:03:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:44,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:44,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:44,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:44,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:03:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:44,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:03:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:45,031 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 16:03:45,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:45,148 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 16:03:45,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630167991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:45,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:03:45,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 16:03:45,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684013064] [2021-11-22 16:03:45,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:45,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:03:45,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:45,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:03:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:03:45,152 INFO L87 Difference]: Start difference. First operand 1043 states and 1763 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:45,474 INFO L93 Difference]: Finished difference Result 4371 states and 7374 transitions. [2021-11-22 16:03:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:03:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-22 16:03:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:45,499 INFO L225 Difference]: With dead ends: 4371 [2021-11-22 16:03:45,499 INFO L226 Difference]: Without dead ends: 3846 [2021-11-22 16:03:45,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 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 16:03:45,504 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 3977 mSDsluCounter, 5439 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3977 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:45,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3977 Valid, 6812 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2021-11-22 16:03:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 2271. [2021-11-22 16:03:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2265 states have (on average 1.7571743929359824) internal successors, (3980), 2270 states have internal predecessors, (3980), 0 states have call successors, (0), 0 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 16:03:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 3980 transitions. [2021-11-22 16:03:45,681 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 3980 transitions. Word has length 64 [2021-11-22 16:03:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:45,681 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 3980 transitions. [2021-11-22 16:03:45,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 3980 transitions. [2021-11-22 16:03:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 16:03:45,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:45,685 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] [2021-11-22 16:03:45,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:45,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_262506e9-1026-43fd-9f35-77f506eefc5e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:45,902 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:45,902 INFO L85 PathProgramCache]: Analyzing trace with hash 943722902, now seen corresponding path program 1 times [2021-11-22 16:03:45,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:45,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475953385] [2021-11-22 16:03:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:45,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:45,955 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 16:03:45,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:45,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475953385] [2021-11-22 16:03:45,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475953385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:45,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:45,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:45,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877998942] [2021-11-22 16:03:45,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:45,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:45,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:45,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:45,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:45,958 INFO L87 Difference]: Start difference. First operand 2271 states and 3980 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 16:03:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:46,184 INFO L93 Difference]: Finished difference Result 6192 states and 10860 transitions. [2021-11-22 16:03:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:46,185 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 16:03:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:46,210 INFO L225 Difference]: With dead ends: 6192 [2021-11-22 16:03:46,210 INFO L226 Difference]: Without dead ends: 4021 [2021-11-22 16:03:46,215 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 16:03:46,217 INFO L933 BasicCegarLoop]: 1375 mSDtfsCounter, 1323 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 2745 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 16:03:46,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1323 Valid, 2745 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2021-11-22 16:03:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3496. [2021-11-22 16:03:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3490 states have (on average 1.771919770773639) internal successors, (6184), 3495 states have internal predecessors, (6184), 0 states have call successors, (0), 0 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 16:03:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 6184 transitions. [2021-11-22 16:03:46,484 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 6184 transitions. Word has length 70 [2021-11-22 16:03:46,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:46,484 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 6184 transitions. [2021-11-22 16:03:46,484 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 16:03:46,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 6184 transitions. [2021-11-22 16:03:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-22 16:03:46,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:46,495 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] [2021-11-22 16:03:46,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 16:03:46,496 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1419577514, now seen corresponding path program 1 times [2021-11-22 16:03:46,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:46,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869768494] [2021-11-22 16:03:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:46,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:46,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:46,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869768494] [2021-11-22 16:03:46,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869768494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:46,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:46,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:46,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109818829] [2021-11-22 16:03:46,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:46,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:46,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:46,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:46,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:46,572 INFO L87 Difference]: Start difference. First operand 3496 states and 6184 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:46,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:46,891 INFO L93 Difference]: Finished difference Result 9256 states and 16386 transitions. [2021-11-22 16:03:46,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:46,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-22 16:03:46,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:46,930 INFO L225 Difference]: With dead ends: 9256 [2021-11-22 16:03:46,930 INFO L226 Difference]: Without dead ends: 5950 [2021-11-22 16:03:46,936 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 16:03:46,936 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1321 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 2736 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 16:03:46,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1321 Valid, 2736 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5950 states. [2021-11-22 16:03:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5950 to 5425. [2021-11-22 16:03:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5419 states have (on average 1.781878575382912) internal successors, (9656), 5424 states have internal predecessors, (9656), 0 states have call successors, (0), 0 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 16:03:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 9656 transitions. [2021-11-22 16:03:47,325 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 9656 transitions. Word has length 71 [2021-11-22 16:03:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:47,326 INFO L470 AbstractCegarLoop]: Abstraction has 5425 states and 9656 transitions. [2021-11-22 16:03:47,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 9656 transitions. [2021-11-22 16:03:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-22 16:03:47,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:47,334 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] [2021-11-22 16:03:47,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 16:03:47,334 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash 96071796, now seen corresponding path program 1 times [2021-11-22 16:03:47,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:47,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694556342] [2021-11-22 16:03:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:47,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:47,379 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 16:03:47,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:47,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694556342] [2021-11-22 16:03:47,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694556342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:47,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:47,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:47,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246841448] [2021-11-22 16:03:47,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:47,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:47,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:47,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:47,382 INFO L87 Difference]: Start difference. First operand 5425 states and 9656 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 16:03:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:47,777 INFO L93 Difference]: Finished difference Result 13589 states and 24179 transitions. [2021-11-22 16:03:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-22 16:03:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:47,820 INFO L225 Difference]: With dead ends: 13589 [2021-11-22 16:03:47,820 INFO L226 Difference]: Without dead ends: 8711 [2021-11-22 16:03:47,828 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 16:03:47,829 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1319 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 2688 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 16:03:47,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 2688 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8711 states. [2021-11-22 16:03:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8711 to 8186. [2021-11-22 16:03:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8186 states, 8180 states have (on average 1.7855745721271394) internal successors, (14606), 8185 states have internal predecessors, (14606), 0 states have call successors, (0), 0 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 16:03:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8186 states to 8186 states and 14606 transitions. [2021-11-22 16:03:48,382 INFO L78 Accepts]: Start accepts. Automaton has 8186 states and 14606 transitions. Word has length 72 [2021-11-22 16:03:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:48,382 INFO L470 AbstractCegarLoop]: Abstraction has 8186 states and 14606 transitions. [2021-11-22 16:03:48,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 16:03:48,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8186 states and 14606 transitions. [2021-11-22 16:03:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 16:03:48,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:48,394 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] [2021-11-22 16:03:48,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 16:03:48,394 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:48,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2115039972, now seen corresponding path program 1 times [2021-11-22 16:03:48,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:48,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841333473] [2021-11-22 16:03:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:48,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:48,460 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 16:03:48,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841333473] [2021-11-22 16:03:48,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841333473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:48,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:48,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:48,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870407715] [2021-11-22 16:03:48,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:48,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:48,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:48,462 INFO L87 Difference]: Start difference. First operand 8186 states and 14606 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:49,050 INFO L93 Difference]: Finished difference Result 20127 states and 35911 transitions. [2021-11-22 16:03:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-22 16:03:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:49,094 INFO L225 Difference]: With dead ends: 20127 [2021-11-22 16:03:49,094 INFO L226 Difference]: Without dead ends: 13062 [2021-11-22 16:03:49,108 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 16:03:49,109 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1317 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 2688 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 16:03:49,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 2688 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13062 states. [2021-11-22 16:03:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13062 to 12537. [2021-11-22 16:03:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12537 states, 12531 states have (on average 1.7870082196153538) internal successors, (22393), 12536 states have internal predecessors, (22393), 0 states have call successors, (0), 0 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 16:03:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12537 states to 12537 states and 22393 transitions. [2021-11-22 16:03:49,821 INFO L78 Accepts]: Start accepts. Automaton has 12537 states and 22393 transitions. Word has length 73 [2021-11-22 16:03:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:49,821 INFO L470 AbstractCegarLoop]: Abstraction has 12537 states and 22393 transitions. [2021-11-22 16:03:49,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 12537 states and 22393 transitions. [2021-11-22 16:03:49,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-22 16:03:49,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:49,833 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] [2021-11-22 16:03:49,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 16:03:49,833 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:49,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:49,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1056488804, now seen corresponding path program 1 times [2021-11-22 16:03:49,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:49,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841088283] [2021-11-22 16:03:49,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:49,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:49,888 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 16:03:49,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:49,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841088283] [2021-11-22 16:03:49,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841088283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:49,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:49,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:49,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857959563] [2021-11-22 16:03:49,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:49,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:49,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:49,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:49,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:49,890 INFO L87 Difference]: Start difference. First operand 12537 states and 22393 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:50,650 INFO L93 Difference]: Finished difference Result 32031 states and 57313 transitions. [2021-11-22 16:03:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-22 16:03:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:50,699 INFO L225 Difference]: With dead ends: 32031 [2021-11-22 16:03:50,699 INFO L226 Difference]: Without dead ends: 21143 [2021-11-22 16:03:50,716 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 16:03:50,717 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1315 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 2736 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 16:03:50,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 2736 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21143 states. [2021-11-22 16:03:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21143 to 20618. [2021-11-22 16:03:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20618 states, 20612 states have (on average 1.7898311663108868) internal successors, (36892), 20617 states have internal predecessors, (36892), 0 states have call successors, (0), 0 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 16:03:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20618 states to 20618 states and 36892 transitions. [2021-11-22 16:03:51,965 INFO L78 Accepts]: Start accepts. Automaton has 20618 states and 36892 transitions. Word has length 74 [2021-11-22 16:03:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:51,965 INFO L470 AbstractCegarLoop]: Abstraction has 20618 states and 36892 transitions. [2021-11-22 16:03:51,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 20618 states and 36892 transitions. [2021-11-22 16:03:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 16:03:51,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:51,981 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] [2021-11-22 16:03:51,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 16:03:51,982 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:51,983 INFO L85 PathProgramCache]: Analyzing trace with hash 409478644, now seen corresponding path program 1 times [2021-11-22 16:03:51,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:51,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412548535] [2021-11-22 16:03:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:51,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:52,058 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 16:03:52,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:52,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412548535] [2021-11-22 16:03:52,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412548535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:52,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:52,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:52,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271422141] [2021-11-22 16:03:52,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:52,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:52,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:52,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:52,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:52,062 INFO L87 Difference]: Start difference. First operand 20618 states and 36892 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 16:03:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:53,129 INFO L93 Difference]: Finished difference Result 53682 states and 96346 transitions. [2021-11-22 16:03:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:53,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-22 16:03:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:53,377 INFO L225 Difference]: With dead ends: 53682 [2021-11-22 16:03:53,377 INFO L226 Difference]: Without dead ends: 35578 [2021-11-22 16:03:53,398 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 16:03:53,399 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1313 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 2735 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 16:03:53,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1313 Valid, 2735 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35578 states. [2021-11-22 16:03:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35578 to 35053. [2021-11-22 16:03:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35053 states, 35047 states have (on average 1.7936485291180415) internal successors, (62862), 35052 states have internal predecessors, (62862), 0 states have call successors, (0), 0 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 16:03:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35053 states to 35053 states and 62862 transitions. [2021-11-22 16:03:54,730 INFO L78 Accepts]: Start accepts. Automaton has 35053 states and 62862 transitions. Word has length 75 [2021-11-22 16:03:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:54,731 INFO L470 AbstractCegarLoop]: Abstraction has 35053 states and 62862 transitions. [2021-11-22 16:03:54,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 16:03:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 35053 states and 62862 transitions. [2021-11-22 16:03:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-22 16:03:54,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:54,746 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] [2021-11-22 16:03:54,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 16:03:54,746 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:54,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1059371606, now seen corresponding path program 1 times [2021-11-22 16:03:54,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:54,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141408853] [2021-11-22 16:03:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:54,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:54,791 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 16:03:54,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:54,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141408853] [2021-11-22 16:03:54,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141408853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:54,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:54,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:54,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857382172] [2021-11-22 16:03:54,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:54,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:54,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:54,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:54,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:54,796 INFO L87 Difference]: Start difference. First operand 35053 states and 62862 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:56,809 INFO L93 Difference]: Finished difference Result 87404 states and 156350 transitions. [2021-11-22 16:03:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:56,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-22 16:03:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:56,927 INFO L225 Difference]: With dead ends: 87404 [2021-11-22 16:03:56,928 INFO L226 Difference]: Without dead ends: 57073 [2021-11-22 16:03:56,968 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 16:03:56,969 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1311 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 2661 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 16:03:56,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 2661 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57073 states. [2021-11-22 16:03:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57073 to 56548. [2021-11-22 16:03:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56548 states, 56542 states have (on average 1.7834883803190549) internal successors, (100842), 56547 states have internal predecessors, (100842), 0 states have call successors, (0), 0 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 16:03:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56548 states to 56548 states and 100842 transitions. [2021-11-22 16:03:59,172 INFO L78 Accepts]: Start accepts. Automaton has 56548 states and 100842 transitions. Word has length 76 [2021-11-22 16:03:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:59,172 INFO L470 AbstractCegarLoop]: Abstraction has 56548 states and 100842 transitions. [2021-11-22 16:03:59,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 56548 states and 100842 transitions. [2021-11-22 16:03:59,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 16:03:59,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:59,189 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] [2021-11-22 16:03:59,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 16:03:59,189 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:59,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1391654976, now seen corresponding path program 1 times [2021-11-22 16:03:59,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:59,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887213956] [2021-11-22 16:03:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:59,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:59,233 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 16:03:59,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:59,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887213956] [2021-11-22 16:03:59,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887213956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:59,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:59,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:59,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551456087] [2021-11-22 16:03:59,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:59,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:59,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:59,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:59,236 INFO L87 Difference]: Start difference. First operand 56548 states and 100842 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:02,510 INFO L93 Difference]: Finished difference Result 145565 states and 259561 transitions. [2021-11-22 16:04:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:04:02,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-22 16:04:02,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:02,689 INFO L225 Difference]: With dead ends: 145565 [2021-11-22 16:04:02,689 INFO L226 Difference]: Without dead ends: 96042 [2021-11-22 16:04:02,734 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 16:04:02,736 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1309 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 2688 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 16:04:02,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1309 Valid, 2688 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:04:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96042 states. [2021-11-22 16:04:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96042 to 95517. [2021-11-22 16:04:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95517 states, 95511 states have (on average 1.77976358744019) internal successors, (169987), 95516 states have internal predecessors, (169987), 0 states have call successors, (0), 0 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 16:04:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95517 states to 95517 states and 169987 transitions. [2021-11-22 16:04:06,821 INFO L78 Accepts]: Start accepts. Automaton has 95517 states and 169987 transitions. Word has length 77 [2021-11-22 16:04:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:06,822 INFO L470 AbstractCegarLoop]: Abstraction has 95517 states and 169987 transitions. [2021-11-22 16:04:06,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 95517 states and 169987 transitions. [2021-11-22 16:04:06,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-22 16:04:06,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:06,837 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] [2021-11-22 16:04:06,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 16:04:06,837 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:04:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:06,838 INFO L85 PathProgramCache]: Analyzing trace with hash 456667854, now seen corresponding path program 1 times [2021-11-22 16:04:06,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:06,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189300968] [2021-11-22 16:04:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:06,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:06,884 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 16:04:06,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189300968] [2021-11-22 16:04:06,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189300968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:06,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:06,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:04:06,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961391701] [2021-11-22 16:04:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:06,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:04:06,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:04:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:04:06,887 INFO L87 Difference]: Start difference. First operand 95517 states and 169987 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:11,950 INFO L93 Difference]: Finished difference Result 263362 states and 469848 transitions. [2021-11-22 16:04:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:04:11,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-22 16:04:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:12,289 INFO L225 Difference]: With dead ends: 263362 [2021-11-22 16:04:12,290 INFO L226 Difference]: Without dead ends: 176850 [2021-11-22 16:04:12,361 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 16:04:12,362 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1307 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 2735 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 16:04:12,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1307 Valid, 2735 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:04:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176850 states. [2021-11-22 16:04:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176850 to 176325. [2021-11-22 16:04:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176325 states, 176319 states have (on average 1.78225262166868) internal successors, (314245), 176324 states have internal predecessors, (314245), 0 states have call successors, (0), 0 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 16:04:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176325 states to 176325 states and 314245 transitions. [2021-11-22 16:04:19,786 INFO L78 Accepts]: Start accepts. Automaton has 176325 states and 314245 transitions. Word has length 78 [2021-11-22 16:04:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:19,786 INFO L470 AbstractCegarLoop]: Abstraction has 176325 states and 314245 transitions. [2021-11-22 16:04:19,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 176325 states and 314245 transitions. [2021-11-22 16:04:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 16:04:19,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:19,807 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] [2021-11-22 16:04:19,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 16:04:19,807 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:04:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash -989580016, now seen corresponding path program 1 times [2021-11-22 16:04:19,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:19,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189630928] [2021-11-22 16:04:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:19,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:19,859 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 16:04:19,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:19,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189630928] [2021-11-22 16:04:19,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189630928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:19,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:19,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:04:19,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311003950] [2021-11-22 16:04:19,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:19,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:04:19,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:19,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:04:19,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:04:19,862 INFO L87 Difference]: Start difference. First operand 176325 states and 314245 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)