./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label00.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF --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 48b75eefd299c5e358d6f7c99602002262fce20f93b0f1303552b05fdc1d7cc8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:21:27,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:21:27,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:21:27,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:21:27,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:21:27,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:21:27,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:21:27,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:21:27,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:21:27,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:21:27,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:21:27,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:21:27,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:21:27,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:21:27,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:21:27,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:21:27,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:21:27,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:21:27,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:21:27,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:21:27,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:21:27,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:21:27,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:21:27,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:21:27,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:21:27,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:21:27,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:21:27,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:21:27,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:21:27,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:21:27,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:21:27,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:21:27,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:21:27,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:21:27,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:21:27,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:21:27,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:21:27,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:21:27,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:21:27,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:21:27,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:21:27,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:21:27,706 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:21:27,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:21:27,709 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:21:27,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:21:27,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:21:27,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:21:27,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:21:27,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:21:27,715 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:21:27,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:21:27,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:21:27,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:21:27,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:21:27,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:21:27,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:21:27,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:21:27,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:21:27,718 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:21:27,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:21:27,719 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:21:27,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:21:27,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:21:27,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:21:27,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:21:27,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:21:27,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:21:27,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:21:27,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:21:27,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:21:27,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:21:27,723 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:21:27,723 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:21:27,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:21:27,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:21:27,724 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_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b75eefd299c5e358d6f7c99602002262fce20f93b0f1303552b05fdc1d7cc8 [2021-11-20 06:21:27,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:21:27,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:21:27,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:21:28,001 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:21:28,001 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:21:28,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem12_label00.c [2021-11-20 06:21:28,068 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/data/f096a0782/6fb8795367fe4098880aceaef64c3a5f/FLAGcd1ae1283 [2021-11-20 06:21:28,841 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:21:28,841 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/sv-benchmarks/c/eca-rers2012/Problem12_label00.c [2021-11-20 06:21:28,879 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/data/f096a0782/6fb8795367fe4098880aceaef64c3a5f/FLAGcd1ae1283 [2021-11-20 06:21:29,392 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/data/f096a0782/6fb8795367fe4098880aceaef64c3a5f [2021-11-20 06:21:29,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:21:29,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:21:29,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:21:29,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:21:29,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:21:29,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:21:29" (1/1) ... [2021-11-20 06:21:29,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d68a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:29, skipping insertion in model container [2021-11-20 06:21:29,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:21:29" (1/1) ... [2021-11-20 06:21:29,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:21:29,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:21:29,783 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_cd33305c-d8aa-4800-b993-4c18bae692d2/sv-benchmarks/c/eca-rers2012/Problem12_label00.c[2236,2249] [2021-11-20 06:21:30,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:21:30,758 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:21:30,795 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_cd33305c-d8aa-4800-b993-4c18bae692d2/sv-benchmarks/c/eca-rers2012/Problem12_label00.c[2236,2249] [2021-11-20 06:21:31,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:21:31,402 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:21:31,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31 WrapperNode [2021-11-20 06:21:31,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:21:31,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:21:31,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:21:31,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:21:31,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (1/1) ... [2021-11-20 06:21:31,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (1/1) ... [2021-11-20 06:21:31,951 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-11-20 06:21:31,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:21:31,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:21:31,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:21:31,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:21:31,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (1/1) ... [2021-11-20 06:21:31,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (1/1) ... [2021-11-20 06:21:32,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (1/1) ... [2021-11-20 06:21:32,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (1/1) ... [2021-11-20 06:21:32,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (1/1) ... [2021-11-20 06:21:32,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (1/1) ... [2021-11-20 06:21:32,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (1/1) ... [2021-11-20 06:21:32,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:21:32,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:21:32,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:21:32,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:21:32,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (1/1) ... [2021-11-20 06:21:32,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:21:32,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:21:32,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:21:32,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:21:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:21:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:21:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:21:32,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:21:32,642 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:21:32,643 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:21:36,965 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:21:36,991 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:21:36,991 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:21:36,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:21:36 BoogieIcfgContainer [2021-11-20 06:21:36,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:21:36,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:21:36,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:21:37,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:21:37,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:21:29" (1/3) ... [2021-11-20 06:21:37,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87cfc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:21:37, skipping insertion in model container [2021-11-20 06:21:37,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:31" (2/3) ... [2021-11-20 06:21:37,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87cfc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:21:37, skipping insertion in model container [2021-11-20 06:21:37,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:21:36" (3/3) ... [2021-11-20 06:21:37,006 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label00.c [2021-11-20 06:21:37,015 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:21:37,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:21:37,090 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:21:37,101 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 [2021-11-20 06:21:37,101 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:21:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:37,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:21:37,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:37,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:37,164 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:37,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:37,170 INFO L85 PathProgramCache]: Analyzing trace with hash -884752143, now seen corresponding path program 1 times [2021-11-20 06:21:37,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:37,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138820283] [2021-11-20 06:21:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:37,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:21:37,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:37,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138820283] [2021-11-20 06:21:37,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138820283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:37,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:37,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:21:37,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549957141] [2021-11-20 06:21:37,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:37,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:21:37,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:21:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:21:37,402 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:41,471 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-20 06:21:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:21:41,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-11-20 06:21:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:41,498 INFO L225 Difference]: With dead ends: 2388 [2021-11-20 06:21:41,499 INFO L226 Difference]: Without dead ends: 1506 [2021-11-20 06:21:41,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:21:41,510 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 819 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:41,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 06:21:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-20 06:21:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-20 06:21:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2021-11-20 06:21:41,633 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 15 [2021-11-20 06:21:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:41,634 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2021-11-20 06:21:41,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2021-11-20 06:21:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 06:21:41,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:41,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:41,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:21:41,639 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:41,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:41,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1356240323, now seen corresponding path program 1 times [2021-11-20 06:21:41,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:41,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792778484] [2021-11-20 06:21:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:41,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:21:41,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:41,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792778484] [2021-11-20 06:21:41,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792778484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:41,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:41,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:21:41,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072389817] [2021-11-20 06:21:41,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:41,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:21:41,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:21:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:21:41,825 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:45,688 INFO L93 Difference]: Finished difference Result 4512 states and 7393 transitions. [2021-11-20 06:21:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:21:45,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-20 06:21:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:45,707 INFO L225 Difference]: With dead ends: 4512 [2021-11-20 06:21:45,708 INFO L226 Difference]: Without dead ends: 3008 [2021-11-20 06:21:45,711 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 [2021-11-20 06:21:45,713 INFO L933 BasicCegarLoop]: 1149 mSDtfsCounter, 753 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:45,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1157 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 06:21:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-20 06:21:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-11-20 06:21:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.537080146325241) internal successors, (4622), 3007 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4622 transitions. [2021-11-20 06:21:45,802 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4622 transitions. Word has length 86 [2021-11-20 06:21:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:45,804 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4622 transitions. [2021-11-20 06:21:45,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4622 transitions. [2021-11-20 06:21:45,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 06:21:45,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:45,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:45,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:21:45,818 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1990984141, now seen corresponding path program 1 times [2021-11-20 06:21:45,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:45,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060744565] [2021-11-20 06:21:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:45,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:21:45,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:45,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060744565] [2021-11-20 06:21:45,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060744565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:45,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:45,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:21:45,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000693017] [2021-11-20 06:21:45,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:45,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:21:45,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:45,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:21:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:21:45,952 INFO L87 Difference]: Start difference. First operand 3008 states and 4622 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:49,210 INFO L93 Difference]: Finished difference Result 9018 states and 13861 transitions. [2021-11-20 06:21:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:21:49,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-20 06:21:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:49,245 INFO L225 Difference]: With dead ends: 9018 [2021-11-20 06:21:49,246 INFO L226 Difference]: Without dead ends: 6012 [2021-11-20 06:21:49,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:21:49,252 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 775 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:49,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 447 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:21:49,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-11-20 06:21:49,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6012. [2021-11-20 06:21:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 1.3726501414074197) internal successors, (8251), 6011 states have internal predecessors, (8251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 8251 transitions. [2021-11-20 06:21:49,397 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 8251 transitions. Word has length 89 [2021-11-20 06:21:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:49,397 INFO L470 AbstractCegarLoop]: Abstraction has 6012 states and 8251 transitions. [2021-11-20 06:21:49,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 8251 transitions. [2021-11-20 06:21:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 06:21:49,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:49,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:49,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:21:49,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:49,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:49,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1407375044, now seen corresponding path program 1 times [2021-11-20 06:21:49,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:49,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245401455] [2021-11-20 06:21:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:49,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:21:49,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:49,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245401455] [2021-11-20 06:21:49,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245401455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:49,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:49,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:21:49,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557200840] [2021-11-20 06:21:49,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:49,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:21:49,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:49,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:21:49,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:21:49,641 INFO L87 Difference]: Start difference. First operand 6012 states and 8251 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:55,913 INFO L93 Difference]: Finished difference Result 16528 states and 22713 transitions. [2021-11-20 06:21:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:21:55,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-11-20 06:21:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:55,963 INFO L225 Difference]: With dead ends: 16528 [2021-11-20 06:21:55,964 INFO L226 Difference]: Without dead ends: 10518 [2021-11-20 06:21:55,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:21:55,974 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 4360 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5301 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 6274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 5301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:55,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 684 Invalid, 6274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 5301 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-11-20 06:21:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10518 states. [2021-11-20 06:21:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10518 to 9767. [2021-11-20 06:21:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2520991193938154) internal successors, (12228), 9766 states have internal predecessors, (12228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12228 transitions. [2021-11-20 06:21:56,266 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12228 transitions. Word has length 96 [2021-11-20 06:21:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:56,267 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12228 transitions. [2021-11-20 06:21:56,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12228 transitions. [2021-11-20 06:21:56,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 06:21:56,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:56,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:56,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:21:56,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2043288918, now seen corresponding path program 1 times [2021-11-20 06:21:56,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:56,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090411132] [2021-11-20 06:21:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:56,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:21:56,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:56,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090411132] [2021-11-20 06:21:56,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090411132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:56,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:56,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:21:56,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268545492] [2021-11-20 06:21:56,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:56,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:21:56,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:56,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:21:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:21:56,451 INFO L87 Difference]: Start difference. First operand 9767 states and 12228 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:00,091 INFO L93 Difference]: Finished difference Result 27081 states and 34206 transitions. [2021-11-20 06:22:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:22:00,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 167 [2021-11-20 06:22:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:00,151 INFO L225 Difference]: With dead ends: 27081 [2021-11-20 06:22:00,151 INFO L226 Difference]: Without dead ends: 17279 [2021-11-20 06:22:00,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:22:00,165 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 706 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 3837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:00,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 710 Invalid, 3837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 3109 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:22:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17279 states. [2021-11-20 06:22:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17279 to 15775. [2021-11-20 06:22:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.1640674527703816) internal successors, (18362), 15774 states have internal predecessors, (18362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 18362 transitions. [2021-11-20 06:22:00,457 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 18362 transitions. Word has length 167 [2021-11-20 06:22:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:00,459 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 18362 transitions. [2021-11-20 06:22:00,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 18362 transitions. [2021-11-20 06:22:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-20 06:22:00,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:00,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:00,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:22:00,468 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash -358179269, now seen corresponding path program 1 times [2021-11-20 06:22:00,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:00,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564905160] [2021-11-20 06:22:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:00,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 06:22:00,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564905160] [2021-11-20 06:22:00,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564905160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:00,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:00,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:22:00,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602464591] [2021-11-20 06:22:00,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:00,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:00,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:00,753 INFO L87 Difference]: Start difference. First operand 15775 states and 18362 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:03,702 INFO L93 Difference]: Finished difference Result 39811 states and 47231 transitions. [2021-11-20 06:22:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:03,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 237 [2021-11-20 06:22:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:03,748 INFO L225 Difference]: With dead ends: 39811 [2021-11-20 06:22:03,748 INFO L226 Difference]: Without dead ends: 24038 [2021-11-20 06:22:03,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:03,768 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:03,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 310 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 06:22:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24038 states. [2021-11-20 06:22:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24038 to 23285. [2021-11-20 06:22:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.1568459027658478) internal successors, (26936), 23284 states have internal predecessors, (26936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 26936 transitions. [2021-11-20 06:22:04,097 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 26936 transitions. Word has length 237 [2021-11-20 06:22:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:04,098 INFO L470 AbstractCegarLoop]: Abstraction has 23285 states and 26936 transitions. [2021-11-20 06:22:04,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 26936 transitions. [2021-11-20 06:22:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-20 06:22:04,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:04,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:04,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:22:04,103 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash -999996468, now seen corresponding path program 1 times [2021-11-20 06:22:04,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:04,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277446123] [2021-11-20 06:22:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:04,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:22:04,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:04,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277446123] [2021-11-20 06:22:04,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277446123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:04,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:04,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:22:04,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553582949] [2021-11-20 06:22:04,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:04,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:04,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:04,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:04,259 INFO L87 Difference]: Start difference. First operand 23285 states and 26936 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:07,709 INFO L93 Difference]: Finished difference Result 60086 states and 69678 transitions. [2021-11-20 06:22:07,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:07,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-11-20 06:22:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:07,765 INFO L225 Difference]: With dead ends: 60086 [2021-11-20 06:22:07,765 INFO L226 Difference]: Without dead ends: 36803 [2021-11-20 06:22:07,791 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 [2021-11-20 06:22:07,792 INFO L933 BasicCegarLoop]: 1317 mSDtfsCounter, 676 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:07,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 1325 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 06:22:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36803 states. [2021-11-20 06:22:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36803 to 33799. [2021-11-20 06:22:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33799 states, 33798 states have (on average 1.1530563938694598) internal successors, (38971), 33798 states have internal predecessors, (38971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33799 states to 33799 states and 38971 transitions. [2021-11-20 06:22:08,384 INFO L78 Accepts]: Start accepts. Automaton has 33799 states and 38971 transitions. Word has length 242 [2021-11-20 06:22:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:08,384 INFO L470 AbstractCegarLoop]: Abstraction has 33799 states and 38971 transitions. [2021-11-20 06:22:08,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 33799 states and 38971 transitions. [2021-11-20 06:22:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-20 06:22:08,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:08,391 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:08,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:22:08,392 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:08,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash -400405687, now seen corresponding path program 1 times [2021-11-20 06:22:08,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:08,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320419957] [2021-11-20 06:22:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:08,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-20 06:22:08,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:08,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320419957] [2021-11-20 06:22:08,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320419957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:08,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:08,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:22:08,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455661498] [2021-11-20 06:22:08,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:08,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:08,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:08,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:08,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:08,593 INFO L87 Difference]: Start difference. First operand 33799 states and 38971 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:11,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:11,451 INFO L93 Difference]: Finished difference Result 78861 states and 90211 transitions. [2021-11-20 06:22:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:11,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 292 [2021-11-20 06:22:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:11,497 INFO L225 Difference]: With dead ends: 78861 [2021-11-20 06:22:11,497 INFO L226 Difference]: Without dead ends: 45064 [2021-11-20 06:22:11,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:11,519 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 819 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:11,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 205 Invalid, 2754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 06:22:11,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45064 states. [2021-11-20 06:22:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45064 to 40558. [2021-11-20 06:22:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40558 states, 40557 states have (on average 1.1331459427472446) internal successors, (45957), 40557 states have internal predecessors, (45957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40558 states to 40558 states and 45957 transitions. [2021-11-20 06:22:12,574 INFO L78 Accepts]: Start accepts. Automaton has 40558 states and 45957 transitions. Word has length 292 [2021-11-20 06:22:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:12,575 INFO L470 AbstractCegarLoop]: Abstraction has 40558 states and 45957 transitions. [2021-11-20 06:22:12,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 40558 states and 45957 transitions. [2021-11-20 06:22:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-20 06:22:12,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:12,610 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:12,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:22:12,613 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:12,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2085073940, now seen corresponding path program 1 times [2021-11-20 06:22:12,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:12,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85544647] [2021-11-20 06:22:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:12,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:22:12,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:12,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85544647] [2021-11-20 06:22:12,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85544647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:12,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:12,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:22:12,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873203438] [2021-11-20 06:22:12,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:12,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:12,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:12,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:12,775 INFO L87 Difference]: Start difference. First operand 40558 states and 45957 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:15,831 INFO L93 Difference]: Finished difference Result 96134 states and 110249 transitions. [2021-11-20 06:22:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 314 [2021-11-20 06:22:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:15,901 INFO L225 Difference]: With dead ends: 96134 [2021-11-20 06:22:15,901 INFO L226 Difference]: Without dead ends: 55578 [2021-11-20 06:22:15,926 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 [2021-11-20 06:22:15,927 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:15,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1216 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 06:22:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55578 states. [2021-11-20 06:22:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55578 to 55578. [2021-11-20 06:22:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55578 states, 55577 states have (on average 1.1162351332385698) internal successors, (62037), 55577 states have internal predecessors, (62037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55578 states to 55578 states and 62037 transitions. [2021-11-20 06:22:16,696 INFO L78 Accepts]: Start accepts. Automaton has 55578 states and 62037 transitions. Word has length 314 [2021-11-20 06:22:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:16,697 INFO L470 AbstractCegarLoop]: Abstraction has 55578 states and 62037 transitions. [2021-11-20 06:22:16,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 55578 states and 62037 transitions. [2021-11-20 06:22:16,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-20 06:22:16,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:16,705 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:16,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:22:16,706 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash 314874820, now seen corresponding path program 1 times [2021-11-20 06:22:16,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:16,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410320156] [2021-11-20 06:22:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:16,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 06:22:17,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:17,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410320156] [2021-11-20 06:22:17,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410320156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:17,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:17,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:22:17,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528521577] [2021-11-20 06:22:17,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:17,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:17,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:17,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:17,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:17,115 INFO L87 Difference]: Start difference. First operand 55578 states and 62037 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:20,439 INFO L93 Difference]: Finished difference Result 128427 states and 145272 transitions. [2021-11-20 06:22:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 346 [2021-11-20 06:22:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:20,501 INFO L225 Difference]: With dead ends: 128427 [2021-11-20 06:22:20,502 INFO L226 Difference]: Without dead ends: 69096 [2021-11-20 06:22:20,523 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 [2021-11-20 06:22:20,524 INFO L933 BasicCegarLoop]: 1307 mSDtfsCounter, 778 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:20,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1315 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 06:22:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69096 states. [2021-11-20 06:22:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69096 to 67594. [2021-11-20 06:22:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67594 states, 67593 states have (on average 1.107318805201722) internal successors, (74847), 67593 states have internal predecessors, (74847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67594 states to 67594 states and 74847 transitions. [2021-11-20 06:22:21,282 INFO L78 Accepts]: Start accepts. Automaton has 67594 states and 74847 transitions. Word has length 346 [2021-11-20 06:22:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:21,283 INFO L470 AbstractCegarLoop]: Abstraction has 67594 states and 74847 transitions. [2021-11-20 06:22:21,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 67594 states and 74847 transitions. [2021-11-20 06:22:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-11-20 06:22:21,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:21,291 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:21,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:22:21,291 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2050413354, now seen corresponding path program 1 times [2021-11-20 06:22:21,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:21,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523016538] [2021-11-20 06:22:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:21,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 06:22:21,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:21,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523016538] [2021-11-20 06:22:21,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523016538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:21,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:21,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:22:21,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308456085] [2021-11-20 06:22:21,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:21,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:21,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:21,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:21,698 INFO L87 Difference]: Start difference. First operand 67594 states and 74847 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:24,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:24,859 INFO L93 Difference]: Finished difference Result 135186 states and 149692 transitions. [2021-11-20 06:22:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:24,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 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 409 [2021-11-20 06:22:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:24,912 INFO L225 Difference]: With dead ends: 135186 [2021-11-20 06:22:24,913 INFO L226 Difference]: Without dead ends: 67594 [2021-11-20 06:22:24,932 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 [2021-11-20 06:22:24,933 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 684 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:24,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 219 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 06:22:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67594 states. [2021-11-20 06:22:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67594 to 67594. [2021-11-20 06:22:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67594 states, 67593 states have (on average 1.1030284201026734) internal successors, (74557), 67593 states have internal predecessors, (74557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67594 states to 67594 states and 74557 transitions. [2021-11-20 06:22:25,699 INFO L78 Accepts]: Start accepts. Automaton has 67594 states and 74557 transitions. Word has length 409 [2021-11-20 06:22:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:25,700 INFO L470 AbstractCegarLoop]: Abstraction has 67594 states and 74557 transitions. [2021-11-20 06:22:25,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 67594 states and 74557 transitions. [2021-11-20 06:22:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-11-20 06:22:25,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:25,717 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:25,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:22:25,718 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:25,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1353959124, now seen corresponding path program 1 times [2021-11-20 06:22:25,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:25,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013357946] [2021-11-20 06:22:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:25,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 424 proven. 229 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:22:26,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:26,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013357946] [2021-11-20 06:22:26,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013357946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:22:26,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404698175] [2021-11-20 06:22:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:26,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:22:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:22:26,369 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:22:26,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:22:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:26,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:22:26,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2021-11-20 06:22:27,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:22:27,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404698175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:27,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:22:27,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-20 06:22:27,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382757166] [2021-11-20 06:22:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:27,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:27,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:27,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:22:27,653 INFO L87 Difference]: Start difference. First operand 67594 states and 74557 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:31,097 INFO L93 Difference]: Finished difference Result 150957 states and 168521 transitions. [2021-11-20 06:22:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 517 [2021-11-20 06:22:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:31,170 INFO L225 Difference]: With dead ends: 150957 [2021-11-20 06:22:31,170 INFO L226 Difference]: Without dead ends: 83365 [2021-11-20 06:22:31,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:22:31,192 INFO L933 BasicCegarLoop]: 1389 mSDtfsCounter, 645 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:31,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 1397 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 06:22:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83365 states. [2021-11-20 06:22:32,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83365 to 79610. [2021-11-20 06:22:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79610 states, 79609 states have (on average 1.0953284176412215) internal successors, (87198), 79609 states have internal predecessors, (87198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79610 states to 79610 states and 87198 transitions. [2021-11-20 06:22:32,239 INFO L78 Accepts]: Start accepts. Automaton has 79610 states and 87198 transitions. Word has length 517 [2021-11-20 06:22:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:32,240 INFO L470 AbstractCegarLoop]: Abstraction has 79610 states and 87198 transitions. [2021-11-20 06:22:32,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 79610 states and 87198 transitions. [2021-11-20 06:22:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-11-20 06:22:32,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:32,260 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:32,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:32,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:22:32,483 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:32,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:32,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1858215506, now seen corresponding path program 1 times [2021-11-20 06:22:32,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:32,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604757812] [2021-11-20 06:22:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:32,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 529 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-20 06:22:32,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604757812] [2021-11-20 06:22:32,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604757812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:32,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:32,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:22:32,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333463205] [2021-11-20 06:22:32,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:32,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:32,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:32,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:32,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:32,762 INFO L87 Difference]: Start difference. First operand 79610 states and 87198 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:36,113 INFO L93 Difference]: Finished difference Result 161471 states and 176728 transitions. [2021-11-20 06:22:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:36,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 545 [2021-11-20 06:22:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:36,207 INFO L225 Difference]: With dead ends: 161471 [2021-11-20 06:22:36,208 INFO L226 Difference]: Without dead ends: 82614 [2021-11-20 06:22:36,242 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 [2021-11-20 06:22:36,243 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 686 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:36,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 1179 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:22:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82614 states. [2021-11-20 06:22:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82614 to 79610. [2021-11-20 06:22:37,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79610 states, 79609 states have (on average 1.0623798816716703) internal successors, (84575), 79609 states have internal predecessors, (84575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:37,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79610 states to 79610 states and 84575 transitions. [2021-11-20 06:22:37,486 INFO L78 Accepts]: Start accepts. Automaton has 79610 states and 84575 transitions. Word has length 545 [2021-11-20 06:22:37,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:37,487 INFO L470 AbstractCegarLoop]: Abstraction has 79610 states and 84575 transitions. [2021-11-20 06:22:37,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:37,487 INFO L276 IsEmpty]: Start isEmpty. Operand 79610 states and 84575 transitions. [2021-11-20 06:22:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-11-20 06:22:37,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:37,511 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:37,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:22:37,512 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:37,512 INFO L85 PathProgramCache]: Analyzing trace with hash 73847232, now seen corresponding path program 1 times [2021-11-20 06:22:37,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:37,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661063334] [2021-11-20 06:22:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:37,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2021-11-20 06:22:37,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:37,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661063334] [2021-11-20 06:22:37,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661063334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:37,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:37,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:22:37,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432146458] [2021-11-20 06:22:37,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:37,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:37,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:37,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:37,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:37,758 INFO L87 Difference]: Start difference. First operand 79610 states and 84575 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:41,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:41,370 INFO L93 Difference]: Finished difference Result 199772 states and 212820 transitions. [2021-11-20 06:22:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:41,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 593 [2021-11-20 06:22:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:41,480 INFO L225 Difference]: With dead ends: 199772 [2021-11-20 06:22:41,480 INFO L226 Difference]: Without dead ends: 120915 [2021-11-20 06:22:41,513 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 [2021-11-20 06:22:41,513 INFO L933 BasicCegarLoop]: 1302 mSDtfsCounter, 750 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:41,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1310 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 2340 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:22:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120915 states. [2021-11-20 06:22:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120915 to 112654. [2021-11-20 06:22:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112654 states, 112653 states have (on average 1.055071769060744) internal successors, (118857), 112653 states have internal predecessors, (118857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112654 states to 112654 states and 118857 transitions. [2021-11-20 06:22:43,231 INFO L78 Accepts]: Start accepts. Automaton has 112654 states and 118857 transitions. Word has length 593 [2021-11-20 06:22:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:43,231 INFO L470 AbstractCegarLoop]: Abstraction has 112654 states and 118857 transitions. [2021-11-20 06:22:43,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 112654 states and 118857 transitions. [2021-11-20 06:22:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2021-11-20 06:22:43,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:43,257 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:43,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:22:43,257 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:43,258 INFO L85 PathProgramCache]: Analyzing trace with hash 256922568, now seen corresponding path program 1 times [2021-11-20 06:22:43,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:43,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856610928] [2021-11-20 06:22:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:43,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-20 06:22:43,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:43,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856610928] [2021-11-20 06:22:43,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856610928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:43,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:43,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:22:43,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139662887] [2021-11-20 06:22:43,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:43,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:43,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:43,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:43,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:43,568 INFO L87 Difference]: Start difference. First operand 112654 states and 118857 transitions. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:47,704 INFO L93 Difference]: Finished difference Result 272619 states and 289015 transitions. [2021-11-20 06:22:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:47,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 700 [2021-11-20 06:22:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:47,864 INFO L225 Difference]: With dead ends: 272619 [2021-11-20 06:22:47,864 INFO L226 Difference]: Without dead ends: 160718 [2021-11-20 06:22:47,913 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 [2021-11-20 06:22:48,301 INFO L933 BasicCegarLoop]: 1180 mSDtfsCounter, 796 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:48,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 1188 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:22:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160718 states. [2021-11-20 06:22:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160718 to 159967. [2021-11-20 06:22:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159967 states, 159966 states have (on average 1.0608066714176763) internal successors, (169693), 159966 states have internal predecessors, (169693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159967 states to 159967 states and 169693 transitions. [2021-11-20 06:22:50,582 INFO L78 Accepts]: Start accepts. Automaton has 159967 states and 169693 transitions. Word has length 700 [2021-11-20 06:22:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:50,583 INFO L470 AbstractCegarLoop]: Abstraction has 159967 states and 169693 transitions. [2021-11-20 06:22:50,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 159967 states and 169693 transitions. [2021-11-20 06:22:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-20 06:22:50,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:50,633 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:50,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:22:50,633 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:50,634 INFO L85 PathProgramCache]: Analyzing trace with hash 815505428, now seen corresponding path program 1 times [2021-11-20 06:22:50,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:50,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642891069] [2021-11-20 06:22:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:50,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 624 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 06:22:50,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:50,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642891069] [2021-11-20 06:22:50,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642891069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:50,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:50,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:22:50,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383257310] [2021-11-20 06:22:50,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:50,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:50,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:50,913 INFO L87 Difference]: Start difference. First operand 159967 states and 169693 transitions. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:54,749 INFO L93 Difference]: Finished difference Result 340960 states and 361047 transitions. [2021-11-20 06:22:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:22:54,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 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 703 [2021-11-20 06:22:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:54,923 INFO L225 Difference]: With dead ends: 340960 [2021-11-20 06:22:54,923 INFO L226 Difference]: Without dead ends: 181746 [2021-11-20 06:22:54,972 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 [2021-11-20 06:22:54,973 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 663 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:54,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 233 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:22:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181746 states. [2021-11-20 06:22:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181746 to 156963. [2021-11-20 06:22:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156963 states, 156962 states have (on average 1.0590333966182899) internal successors, (166228), 156962 states have internal predecessors, (166228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156963 states to 156963 states and 166228 transitions. [2021-11-20 06:22:57,353 INFO L78 Accepts]: Start accepts. Automaton has 156963 states and 166228 transitions. Word has length 703 [2021-11-20 06:22:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:57,354 INFO L470 AbstractCegarLoop]: Abstraction has 156963 states and 166228 transitions. [2021-11-20 06:22:57,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:22:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 156963 states and 166228 transitions. [2021-11-20 06:22:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2021-11-20 06:22:57,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:57,394 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:57,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:22:57,395 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1945228874, now seen corresponding path program 1 times [2021-11-20 06:22:57,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:57,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98712919] [2021-11-20 06:22:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:57,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 640 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-20 06:22:57,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98712919] [2021-11-20 06:22:57,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98712919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:57,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:57,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:22:57,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243128908] [2021-11-20 06:22:57,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:57,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:22:57,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:57,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:22:57,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:22:57,705 INFO L87 Difference]: Start difference. First operand 156963 states and 166228 transitions. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:01,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:01,289 INFO L93 Difference]: Finished difference Result 317679 states and 336288 transitions. [2021-11-20 06:23:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:23:01,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 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 731 [2021-11-20 06:23:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:01,443 INFO L225 Difference]: With dead ends: 317679 [2021-11-20 06:23:01,444 INFO L226 Difference]: Without dead ends: 161469 [2021-11-20 06:23:01,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:23:01,509 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 803 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:01,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 909 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 2128 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 06:23:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161469 states. [2021-11-20 06:23:03,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161469 to 148702. [2021-11-20 06:23:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148702 states, 148701 states have (on average 1.052481153455592) internal successors, (156505), 148701 states have internal predecessors, (156505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148702 states to 148702 states and 156505 transitions. [2021-11-20 06:23:03,785 INFO L78 Accepts]: Start accepts. Automaton has 148702 states and 156505 transitions. Word has length 731 [2021-11-20 06:23:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:03,785 INFO L470 AbstractCegarLoop]: Abstraction has 148702 states and 156505 transitions. [2021-11-20 06:23:03,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 148702 states and 156505 transitions. [2021-11-20 06:23:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2021-11-20 06:23:03,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:03,827 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:03,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:23:03,827 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:23:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1176686982, now seen corresponding path program 1 times [2021-11-20 06:23:03,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:03,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729144042] [2021-11-20 06:23:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:03,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 573 proven. 159 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 06:23:04,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:04,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729144042] [2021-11-20 06:23:04,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729144042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:04,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964984739] [2021-11-20 06:23:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:04,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:04,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:04,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:04,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd33305c-d8aa-4800-b993-4c18bae692d2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:23:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:23:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 797 trivial. 0 not checked. [2021-11-20 06:23:06,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:23:06,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964984739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:06,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:23:06,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 06:23:06,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837522611] [2021-11-20 06:23:06,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:06,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:23:06,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:23:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:23:06,417 INFO L87 Difference]: Start difference. First operand 148702 states and 156505 transitions. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)