./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y --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 05d3b7d21cc48825b4a0189c75f03d768acc6241312029d3e223c1b9b2a509ea --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:47:29,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:47:29,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:47:29,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:47:29,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:47:29,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:47:29,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:47:29,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:47:29,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:47:29,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:47:29,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:47:29,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:47:29,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:47:29,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:47:29,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:47:29,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:47:29,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:47:29,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:47:29,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:47:29,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:47:29,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:47:29,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:47:29,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:47:29,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:47:29,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:47:29,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:47:29,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:47:29,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:47:29,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:47:29,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:47:29,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:47:29,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:47:29,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:47:29,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:47:29,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:47:29,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:47:29,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:47:29,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:47:29,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:47:29,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:47:29,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:47:29,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:47:29,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:47:29,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:47:29,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:47:29,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:47:29,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:47:29,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:47:29,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:47:29,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:47:29,965 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:47:29,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:47:29,965 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:47:29,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:47:29,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:47:29,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:47:29,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:47:29,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:47:29,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:47:29,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:47:29,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:47:29,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:47:29,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:47:29,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:47:29,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:47:29,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:47:29,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:47:29,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:47:29,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:47:29,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:47:29,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:47:29,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:47:29,971 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:47:29,971 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:47:29,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:47:29,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:47:29,972 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_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d3b7d21cc48825b4a0189c75f03d768acc6241312029d3e223c1b9b2a509ea [2021-11-13 17:47:30,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:47:30,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:47:30,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:47:30,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:47:30,285 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:47:30,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2021-11-13 17:47:30,401 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/data/1d0ed89a0/feb437b5d1e94733a0e7b755612116b3/FLAG0b933ca0b [2021-11-13 17:47:31,021 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:47:31,022 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2021-11-13 17:47:31,047 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/data/1d0ed89a0/feb437b5d1e94733a0e7b755612116b3/FLAG0b933ca0b [2021-11-13 17:47:31,319 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/data/1d0ed89a0/feb437b5d1e94733a0e7b755612116b3 [2021-11-13 17:47:31,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:47:31,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:47:31,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:47:31,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:47:31,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:47:31,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e77083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31, skipping insertion in model container [2021-11-13 17:47:31,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:47:31,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:47:31,559 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[671,684] [2021-11-13 17:47:31,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:47:31,649 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:47:31,661 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[671,684] [2021-11-13 17:47:31,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:47:31,722 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:47:31,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31 WrapperNode [2021-11-13 17:47:31,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:47:31,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:47:31,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:47:31,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:47:31,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:47:31,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:47:31,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:47:31,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:47:31,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:47:31,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:47:31,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:47:31,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:47:31,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (1/1) ... [2021-11-13 17:47:31,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:47:31,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:31,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:47:31,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:47:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 17:47:31,990 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 17:47:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:47:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 17:47:31,991 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 17:47:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 17:47:31,991 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 17:47:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 17:47:31,992 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 17:47:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 17:47:31,993 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 17:47:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 17:47:31,993 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 17:47:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:47:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 17:47:31,994 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 17:47:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:47:31,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:47:32,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:47:32,640 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-13 17:47:32,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:47:32 BoogieIcfgContainer [2021-11-13 17:47:32,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:47:32,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:47:32,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:47:32,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:47:32,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:47:31" (1/3) ... [2021-11-13 17:47:32,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e42e0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:47:32, skipping insertion in model container [2021-11-13 17:47:32,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:31" (2/3) ... [2021-11-13 17:47:32,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e42e0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:47:32, skipping insertion in model container [2021-11-13 17:47:32,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:47:32" (3/3) ... [2021-11-13 17:47:32,656 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2021-11-13 17:47:32,662 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:47:32,662 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:47:32,708 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:47:32,715 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 [2021-11-13 17:47:32,715 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:47:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 161 states have (on average 1.6211180124223603) internal successors, (261), 165 states have internal predecessors, (261), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 17:47:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:32,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:32,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:32,755 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash -256970182, now seen corresponding path program 1 times [2021-11-13 17:47:32,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:32,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974832226] [2021-11-13 17:47:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:32,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:32,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:33,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:33,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:33,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:33,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:33,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:33,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974832226] [2021-11-13 17:47:33,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974832226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:33,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:33,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:47:33,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459246359] [2021-11-13 17:47:33,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:33,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:47:33,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:33,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:47:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:33,274 INFO L87 Difference]: Start difference. First operand has 190 states, 161 states have (on average 1.6211180124223603) internal successors, (261), 165 states have internal predecessors, (261), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:34,223 INFO L93 Difference]: Finished difference Result 422 states and 678 transitions. [2021-11-13 17:47:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:47:34,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:34,242 INFO L225 Difference]: With dead ends: 422 [2021-11-13 17:47:34,242 INFO L226 Difference]: Without dead ends: 238 [2021-11-13 17:47:34,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:34,252 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 444 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 515.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.67ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 621.92ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:34,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 523 Invalid, 335 Unknown, 0 Unchecked, 34.67ms Time], IncrementalHoareTripleChecker [48 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 621.92ms Time] [2021-11-13 17:47:34,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-13 17:47:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2021-11-13 17:47:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 157 states have (on average 1.5286624203821657) internal successors, (240), 159 states have internal predecessors, (240), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 17:47:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 278 transitions. [2021-11-13 17:47:34,351 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 278 transitions. Word has length 90 [2021-11-13 17:47:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:34,352 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 278 transitions. [2021-11-13 17:47:34,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 278 transitions. [2021-11-13 17:47:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:34,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:34,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:34,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:47:34,370 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:34,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash -497209928, now seen corresponding path program 1 times [2021-11-13 17:47:34,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:34,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451064839] [2021-11-13 17:47:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:34,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:34,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:34,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:34,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:34,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:34,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:34,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451064839] [2021-11-13 17:47:34,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451064839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:34,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:34,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:47:34,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229418065] [2021-11-13 17:47:34,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:34,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:47:34,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:34,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:47:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:47:34,643 INFO L87 Difference]: Start difference. First operand 184 states and 278 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:35,462 INFO L93 Difference]: Finished difference Result 409 states and 631 transitions. [2021-11-13 17:47:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:47:35,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:35,467 INFO L225 Difference]: With dead ends: 409 [2021-11-13 17:47:35,468 INFO L226 Difference]: Without dead ends: 237 [2021-11-13 17:47:35,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:47:35,472 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 434 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 546.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.82ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 673.40ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:35,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 603 Invalid, 610 Unknown, 0 Unchecked, 14.82ms Time], IncrementalHoareTripleChecker [54 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 673.40ms Time] [2021-11-13 17:47:35,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-13 17:47:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 184. [2021-11-13 17:47:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 157 states have (on average 1.5222929936305734) internal successors, (239), 159 states have internal predecessors, (239), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 17:47:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 277 transitions. [2021-11-13 17:47:35,503 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 277 transitions. Word has length 90 [2021-11-13 17:47:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:35,504 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 277 transitions. [2021-11-13 17:47:35,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 277 transitions. [2021-11-13 17:47:35,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:35,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:35,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:35,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:47:35,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:35,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1720420470, now seen corresponding path program 1 times [2021-11-13 17:47:35,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:35,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76868074] [2021-11-13 17:47:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:35,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:35,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:35,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:35,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:35,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:35,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:35,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76868074] [2021-11-13 17:47:35,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76868074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:35,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:35,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:47:35,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488400506] [2021-11-13 17:47:35,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:35,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:47:35,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:47:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:47:35,651 INFO L87 Difference]: Start difference. First operand 184 states and 277 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:36,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:36,542 INFO L93 Difference]: Finished difference Result 418 states and 646 transitions. [2021-11-13 17:47:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:47:36,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:36,546 INFO L225 Difference]: With dead ends: 418 [2021-11-13 17:47:36,546 INFO L226 Difference]: Without dead ends: 246 [2021-11-13 17:47:36,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:47:36,550 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 464 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 616.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.55ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 737.98ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:36,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 740 Invalid, 708 Unknown, 0 Unchecked, 18.55ms Time], IncrementalHoareTripleChecker [58 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 737.98ms Time] [2021-11-13 17:47:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-13 17:47:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 184. [2021-11-13 17:47:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 157 states have (on average 1.515923566878981) internal successors, (238), 159 states have internal predecessors, (238), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 17:47:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 276 transitions. [2021-11-13 17:47:36,581 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 276 transitions. Word has length 90 [2021-11-13 17:47:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:36,582 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 276 transitions. [2021-11-13 17:47:36,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 276 transitions. [2021-11-13 17:47:36,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:36,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:36,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:36,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:47:36,585 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:36,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:36,586 INFO L85 PathProgramCache]: Analyzing trace with hash -840442376, now seen corresponding path program 1 times [2021-11-13 17:47:36,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:36,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617405692] [2021-11-13 17:47:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:36,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:36,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:36,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:36,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:36,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:36,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617405692] [2021-11-13 17:47:36,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617405692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:36,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:36,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:47:36,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334781910] [2021-11-13 17:47:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:36,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:47:36,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:47:36,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:47:36,726 INFO L87 Difference]: Start difference. First operand 184 states and 276 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:37,486 INFO L93 Difference]: Finished difference Result 407 states and 625 transitions. [2021-11-13 17:47:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:47:37,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:37,492 INFO L225 Difference]: With dead ends: 407 [2021-11-13 17:47:37,492 INFO L226 Difference]: Without dead ends: 235 [2021-11-13 17:47:37,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:47:37,505 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 530 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 514.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.72ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 622.64ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:37,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 618 Invalid, 590 Unknown, 0 Unchecked, 11.72ms Time], IncrementalHoareTripleChecker [77 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 622.64ms Time] [2021-11-13 17:47:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-13 17:47:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 184. [2021-11-13 17:47:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 157 states have (on average 1.4968152866242037) internal successors, (235), 159 states have internal predecessors, (235), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 17:47:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 273 transitions. [2021-11-13 17:47:37,553 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 273 transitions. Word has length 90 [2021-11-13 17:47:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:37,556 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 273 transitions. [2021-11-13 17:47:37,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 273 transitions. [2021-11-13 17:47:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:37,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:37,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:37,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:47:37,575 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash 46780470, now seen corresponding path program 1 times [2021-11-13 17:47:37,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:37,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118205345] [2021-11-13 17:47:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:37,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:37,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:37,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:37,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:37,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:37,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:37,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:37,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118205345] [2021-11-13 17:47:37,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118205345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:37,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:37,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:47:37,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539890499] [2021-11-13 17:47:37,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:37,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:47:37,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:47:37,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:37,723 INFO L87 Difference]: Start difference. First operand 184 states and 273 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:39,686 INFO L93 Difference]: Finished difference Result 642 states and 976 transitions. [2021-11-13 17:47:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 17:47:39,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:39,692 INFO L225 Difference]: With dead ends: 642 [2021-11-13 17:47:39,692 INFO L226 Difference]: Without dead ends: 470 [2021-11-13 17:47:39,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:47:39,695 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 667 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1298.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.68ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1543.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:39,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 1717 Invalid, 1395 Unknown, 0 Unchecked, 33.68ms Time], IncrementalHoareTripleChecker [66 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 1543.08ms Time] [2021-11-13 17:47:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-13 17:47:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 358. [2021-11-13 17:47:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.5064516129032257) internal successors, (467), 313 states have internal predecessors, (467), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (35), 33 states have call predecessors, (35), 32 states have call successors, (35) [2021-11-13 17:47:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 536 transitions. [2021-11-13 17:47:39,753 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 536 transitions. Word has length 90 [2021-11-13 17:47:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:39,754 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 536 transitions. [2021-11-13 17:47:39,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 536 transitions. [2021-11-13 17:47:39,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:39,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:39,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:39,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:47:39,758 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:39,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1864262088, now seen corresponding path program 1 times [2021-11-13 17:47:39,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:39,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222664494] [2021-11-13 17:47:39,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:39,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:39,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:39,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222664494] [2021-11-13 17:47:39,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222664494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:39,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:39,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:47:39,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502673361] [2021-11-13 17:47:39,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:39,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:47:39,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:47:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:47:39,892 INFO L87 Difference]: Start difference. First operand 358 states and 536 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:40,698 INFO L93 Difference]: Finished difference Result 825 states and 1261 transitions. [2021-11-13 17:47:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:47:40,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:40,723 INFO L225 Difference]: With dead ends: 825 [2021-11-13 17:47:40,723 INFO L226 Difference]: Without dead ends: 479 [2021-11-13 17:47:40,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:47:40,727 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 527 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 514.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.42ms SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 616.69ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:40,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 624 Invalid, 617 Unknown, 0 Unchecked, 10.42ms Time], IncrementalHoareTripleChecker [82 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 616.69ms Time] [2021-11-13 17:47:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-13 17:47:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 358. [2021-11-13 17:47:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.5) internal successors, (465), 313 states have internal predecessors, (465), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (35), 33 states have call predecessors, (35), 32 states have call successors, (35) [2021-11-13 17:47:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 534 transitions. [2021-11-13 17:47:40,779 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 534 transitions. Word has length 90 [2021-11-13 17:47:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:40,780 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 534 transitions. [2021-11-13 17:47:40,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 534 transitions. [2021-11-13 17:47:40,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:40,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:40,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:40,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:47:40,783 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:40,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:40,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1787361290, now seen corresponding path program 1 times [2021-11-13 17:47:40,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:40,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734172585] [2021-11-13 17:47:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:40,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:40,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:40,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734172585] [2021-11-13 17:47:40,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734172585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:40,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:40,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:47:40,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826455471] [2021-11-13 17:47:40,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:40,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:47:40,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:47:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:47:40,882 INFO L87 Difference]: Start difference. First operand 358 states and 534 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:41,571 INFO L93 Difference]: Finished difference Result 821 states and 1248 transitions. [2021-11-13 17:47:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:47:41,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:41,577 INFO L225 Difference]: With dead ends: 821 [2021-11-13 17:47:41,577 INFO L226 Difference]: Without dead ends: 475 [2021-11-13 17:47:41,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:47:41,580 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 453 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 461.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.22ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 551.38ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:41,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 717 Invalid, 664 Unknown, 0 Unchecked, 8.22ms Time], IncrementalHoareTripleChecker [64 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 551.38ms Time] [2021-11-13 17:47:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-13 17:47:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 358. [2021-11-13 17:47:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.4935483870967743) internal successors, (463), 313 states have internal predecessors, (463), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (35), 33 states have call predecessors, (35), 32 states have call successors, (35) [2021-11-13 17:47:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 532 transitions. [2021-11-13 17:47:41,654 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 532 transitions. Word has length 90 [2021-11-13 17:47:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:41,655 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 532 transitions. [2021-11-13 17:47:41,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 532 transitions. [2021-11-13 17:47:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:41,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:41,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:41,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:47:41,657 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:41,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:41,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1540255352, now seen corresponding path program 1 times [2021-11-13 17:47:41,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:41,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112527970] [2021-11-13 17:47:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:41,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:41,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:41,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:41,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:41,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:41,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:41,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:41,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112527970] [2021-11-13 17:47:41,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112527970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:41,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:41,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:47:41,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293070072] [2021-11-13 17:47:41,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:41,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:47:41,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:41,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:47:41,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:47:41,800 INFO L87 Difference]: Start difference. First operand 358 states and 532 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:42,437 INFO L93 Difference]: Finished difference Result 817 states and 1235 transitions. [2021-11-13 17:47:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:47:42,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:42,442 INFO L225 Difference]: With dead ends: 817 [2021-11-13 17:47:42,442 INFO L226 Difference]: Without dead ends: 471 [2021-11-13 17:47:42,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:47:42,445 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 524 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 411.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.18ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 489.01ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:42,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 612 Invalid, 601 Unknown, 0 Unchecked, 8.18ms Time], IncrementalHoareTripleChecker [87 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 489.01ms Time] [2021-11-13 17:47:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-13 17:47:42,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 358. [2021-11-13 17:47:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.4870967741935484) internal successors, (461), 313 states have internal predecessors, (461), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (35), 33 states have call predecessors, (35), 32 states have call successors, (35) [2021-11-13 17:47:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 530 transitions. [2021-11-13 17:47:42,486 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 530 transitions. Word has length 90 [2021-11-13 17:47:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:42,486 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 530 transitions. [2021-11-13 17:47:42,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 530 transitions. [2021-11-13 17:47:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:42,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:42,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:42,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:47:42,489 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash -846254154, now seen corresponding path program 1 times [2021-11-13 17:47:42,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:42,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209507631] [2021-11-13 17:47:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:42,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:42,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:42,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:42,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:42,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:42,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:42,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209507631] [2021-11-13 17:47:42,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209507631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:42,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:42,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:47:42,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639392366] [2021-11-13 17:47:42,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:42,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:47:42,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:42,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:47:42,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:42,624 INFO L87 Difference]: Start difference. First operand 358 states and 530 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:44,427 INFO L93 Difference]: Finished difference Result 1311 states and 1978 transitions. [2021-11-13 17:47:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 17:47:44,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:44,438 INFO L225 Difference]: With dead ends: 1311 [2021-11-13 17:47:44,439 INFO L226 Difference]: Without dead ends: 965 [2021-11-13 17:47:44,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:47:44,447 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 693 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1155.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.04ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1353.23ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:44,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 1668 Invalid, 1293 Unknown, 0 Unchecked, 23.04ms Time], IncrementalHoareTripleChecker [77 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 1353.23ms Time] [2021-11-13 17:47:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-13 17:47:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 701. [2021-11-13 17:47:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 611 states have (on average 1.4893617021276595) internal successors, (910), 618 states have internal predecessors, (910), 60 states have call successors, (60), 25 states have call predecessors, (60), 29 states have return successors, (73), 61 states have call predecessors, (73), 58 states have call successors, (73) [2021-11-13 17:47:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1043 transitions. [2021-11-13 17:47:44,538 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1043 transitions. Word has length 90 [2021-11-13 17:47:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:44,538 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 1043 transitions. [2021-11-13 17:47:44,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1043 transitions. [2021-11-13 17:47:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:44,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:44,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:44,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:47:44,542 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash 107686004, now seen corresponding path program 1 times [2021-11-13 17:47:44,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:44,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204645609] [2021-11-13 17:47:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:44,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:44,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:44,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:44,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:44,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:44,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:44,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:44,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204645609] [2021-11-13 17:47:44,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204645609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:44,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:44,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:47:44,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207783328] [2021-11-13 17:47:44,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:44,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:47:44,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:44,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:47:44,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:47:44,684 INFO L87 Difference]: Start difference. First operand 701 states and 1043 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:45,445 INFO L93 Difference]: Finished difference Result 1604 states and 2411 transitions. [2021-11-13 17:47:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:47:45,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:45,454 INFO L225 Difference]: With dead ends: 1604 [2021-11-13 17:47:45,454 INFO L226 Difference]: Without dead ends: 915 [2021-11-13 17:47:45,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:47:45,458 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 451 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 479.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.72ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 575.34ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:45,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 703 Invalid, 622 Unknown, 0 Unchecked, 7.72ms Time], IncrementalHoareTripleChecker [65 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 575.34ms Time] [2021-11-13 17:47:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-11-13 17:47:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 701. [2021-11-13 17:47:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 611 states have (on average 1.4828150572831424) internal successors, (906), 618 states have internal predecessors, (906), 60 states have call successors, (60), 25 states have call predecessors, (60), 29 states have return successors, (73), 61 states have call predecessors, (73), 58 states have call successors, (73) [2021-11-13 17:47:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1039 transitions. [2021-11-13 17:47:45,538 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1039 transitions. Word has length 90 [2021-11-13 17:47:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:45,539 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 1039 transitions. [2021-11-13 17:47:45,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1039 transitions. [2021-11-13 17:47:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:45,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:45,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:45,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:47:45,542 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1108467722, now seen corresponding path program 1 times [2021-11-13 17:47:45,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:45,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79514157] [2021-11-13 17:47:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:45,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:45,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:45,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:45,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:45,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:45,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:45,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:45,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79514157] [2021-11-13 17:47:45,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79514157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:45,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:45,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:47:45,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709430954] [2021-11-13 17:47:45,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:45,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:47:45,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:45,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:47:45,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:47:45,670 INFO L87 Difference]: Start difference. First operand 701 states and 1039 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:47,102 INFO L93 Difference]: Finished difference Result 2428 states and 3639 transitions. [2021-11-13 17:47:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:47:47,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-11-13 17:47:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:47,119 INFO L225 Difference]: With dead ends: 2428 [2021-11-13 17:47:47,119 INFO L226 Difference]: Without dead ends: 1740 [2021-11-13 17:47:47,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:47:47,146 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 785 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 917.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.99ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1098.74ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:47,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 1097 Invalid, 1013 Unknown, 0 Unchecked, 16.99ms Time], IncrementalHoareTripleChecker [89 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1098.74ms Time] [2021-11-13 17:47:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-11-13 17:47:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1344. [2021-11-13 17:47:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1171 states have (on average 1.4628522630230572) internal successors, (1713), 1187 states have internal predecessors, (1713), 114 states have call successors, (114), 49 states have call predecessors, (114), 58 states have return successors, (139), 111 states have call predecessors, (139), 112 states have call successors, (139) [2021-11-13 17:47:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 1966 transitions. [2021-11-13 17:47:47,300 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 1966 transitions. Word has length 90 [2021-11-13 17:47:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:47,301 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 1966 transitions. [2021-11-13 17:47:47,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:47:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 1966 transitions. [2021-11-13 17:47:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 17:47:47,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:47,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 17:47:47,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:47:47,309 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1232549440, now seen corresponding path program 1 times [2021-11-13 17:47:47,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:47,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088212190] [2021-11-13 17:47:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:47,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:47,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:47,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:47,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:47,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:47,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:47,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 17:47:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:47,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:47,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 17:47:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:47:47,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:47,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088212190] [2021-11-13 17:47:47,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088212190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:47,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074614395] [2021-11-13 17:47:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:47,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:47,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:47,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:47:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:47:47,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:47:48,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:47:48,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074614395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:48,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:47:48,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:47:48,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995311379] [2021-11-13 17:47:48,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:48,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:48,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:48,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:48,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:48,117 INFO L87 Difference]: Start difference. First operand 1344 states and 1966 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:47:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:48,379 INFO L93 Difference]: Finished difference Result 3965 states and 5850 transitions. [2021-11-13 17:47:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:47:48,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2021-11-13 17:47:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:48,403 INFO L225 Difference]: With dead ends: 3965 [2021-11-13 17:47:48,403 INFO L226 Difference]: Without dead ends: 2634 [2021-11-13 17:47:48,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:48,411 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 213 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:48,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 518 Invalid, 12 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 13.42ms Time] [2021-11-13 17:47:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-11-13 17:47:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2614. [2021-11-13 17:47:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2283 states have (on average 1.4625492772667543) internal successors, (3339), 2313 states have internal predecessors, (3339), 214 states have call successors, (214), 97 states have call predecessors, (214), 116 states have return successors, (263), 207 states have call predecessors, (263), 212 states have call successors, (263) [2021-11-13 17:47:48,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 3816 transitions. [2021-11-13 17:47:48,733 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 3816 transitions. Word has length 146 [2021-11-13 17:47:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:48,733 INFO L470 AbstractCegarLoop]: Abstraction has 2614 states and 3816 transitions. [2021-11-13 17:47:48,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:47:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 3816 transitions. [2021-11-13 17:47:48,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 17:47:48,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:48,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 17:47:48,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:48,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:48,959 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:48,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:48,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1110346336, now seen corresponding path program 1 times [2021-11-13 17:47:48,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:48,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495617648] [2021-11-13 17:47:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:48,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 17:47:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 17:47:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:47:49,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:49,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495617648] [2021-11-13 17:47:49,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495617648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:49,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473739928] [2021-11-13 17:47:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:49,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:49,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:49,149 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:49,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:47:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:47:49,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 17:47:49,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:47:49,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473739928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:49,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:47:49,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:47:49,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221114788] [2021-11-13 17:47:49,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:49,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:49,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:49,758 INFO L87 Difference]: Start difference. First operand 2614 states and 3816 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:47:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:50,195 INFO L93 Difference]: Finished difference Result 7759 states and 11428 transitions. [2021-11-13 17:47:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:47:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2021-11-13 17:47:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:50,237 INFO L225 Difference]: With dead ends: 7759 [2021-11-13 17:47:50,237 INFO L226 Difference]: Without dead ends: 5158 [2021-11-13 17:47:50,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:50,250 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 219 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.18ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.33ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:50,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 518 Invalid, 12 Unknown, 0 Unchecked, 2.18ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 12.33ms Time] [2021-11-13 17:47:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-11-13 17:47:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 5122. [2021-11-13 17:47:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5122 states, 4475 states have (on average 1.4603351955307262) internal successors, (6535), 4533 states have internal predecessors, (6535), 414 states have call successors, (414), 193 states have call predecessors, (414), 232 states have return successors, (511), 399 states have call predecessors, (511), 412 states have call successors, (511) [2021-11-13 17:47:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5122 states to 5122 states and 7460 transitions. [2021-11-13 17:47:50,665 INFO L78 Accepts]: Start accepts. Automaton has 5122 states and 7460 transitions. Word has length 146 [2021-11-13 17:47:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:50,666 INFO L470 AbstractCegarLoop]: Abstraction has 5122 states and 7460 transitions. [2021-11-13 17:47:50,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:47:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5122 states and 7460 transitions. [2021-11-13 17:47:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 17:47:50,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:50,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 17:47:50,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:50,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 17:47:50,902 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:50,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1109506432, now seen corresponding path program 1 times [2021-11-13 17:47:50,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:50,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812499558] [2021-11-13 17:47:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:50,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:50,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:50,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:50,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:51,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:51,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:51,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 17:47:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:51,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:51,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 17:47:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:47:51,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:51,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812499558] [2021-11-13 17:47:51,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812499558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:51,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634531104] [2021-11-13 17:47:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:51,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:51,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:51,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:51,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:47:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:47:51,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 17:47:51,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:47:51,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634531104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:51,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:47:51,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 17:47:51,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717266078] [2021-11-13 17:47:51,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:51,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:51,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:51,430 INFO L87 Difference]: Start difference. First operand 5122 states and 7460 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 17:47:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:52,175 INFO L93 Difference]: Finished difference Result 15038 states and 22145 transitions. [2021-11-13 17:47:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:47:52,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 146 [2021-11-13 17:47:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:52,251 INFO L225 Difference]: With dead ends: 15038 [2021-11-13 17:47:52,251 INFO L226 Difference]: Without dead ends: 9930 [2021-11-13 17:47:52,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:52,270 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 224 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:52,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 765 Invalid, 13 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 52.63ms Time] [2021-11-13 17:47:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9930 states. [2021-11-13 17:47:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9930 to 9930. [2021-11-13 17:47:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9930 states, 8672 states have (on average 1.450991697416974) internal successors, (12583), 8771 states have internal predecessors, (12583), 793 states have call successors, (793), 385 states have call predecessors, (793), 464 states have return successors, (1174), 781 states have call predecessors, (1174), 791 states have call successors, (1174) [2021-11-13 17:47:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9930 states to 9930 states and 14550 transitions. [2021-11-13 17:47:53,254 INFO L78 Accepts]: Start accepts. Automaton has 9930 states and 14550 transitions. Word has length 146 [2021-11-13 17:47:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:53,255 INFO L470 AbstractCegarLoop]: Abstraction has 9930 states and 14550 transitions. [2021-11-13 17:47:53,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 17:47:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9930 states and 14550 transitions. [2021-11-13 17:47:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 17:47:53,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:53,307 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-11-13 17:47:53,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:53,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 17:47:53,530 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash 34147053, now seen corresponding path program 1 times [2021-11-13 17:47:53,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:53,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142116487] [2021-11-13 17:47:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:53,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 17:47:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-13 17:47:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-13 17:47:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 17:47:53,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:53,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142116487] [2021-11-13 17:47:53,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142116487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:53,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141581309] [2021-11-13 17:47:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:53,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:53,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:53,722 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:53,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:47:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:47:53,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 17:47:54,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:47:54,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141581309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:54,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:47:54,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:47:54,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360214718] [2021-11-13 17:47:54,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:54,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:54,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:54,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:54,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:54,395 INFO L87 Difference]: Start difference. First operand 9930 states and 14550 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 17:47:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:55,719 INFO L93 Difference]: Finished difference Result 29428 states and 43585 transitions. [2021-11-13 17:47:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:47:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 190 [2021-11-13 17:47:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:55,850 INFO L225 Difference]: With dead ends: 29428 [2021-11-13 17:47:55,851 INFO L226 Difference]: Without dead ends: 19518 [2021-11-13 17:47:55,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:55,900 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 158 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.98ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:55,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 518 Invalid, 12 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 9.98ms Time] [2021-11-13 17:47:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19518 states. [2021-11-13 17:47:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19518 to 19386. [2021-11-13 17:47:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19386 states, 16944 states have (on average 1.4498937677053825) internal successors, (24567), 17139 states have internal predecessors, (24567), 1513 states have call successors, (1513), 769 states have call predecessors, (1513), 928 states have return successors, (2238), 1485 states have call predecessors, (2238), 1511 states have call successors, (2238) [2021-11-13 17:47:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19386 states to 19386 states and 28318 transitions. [2021-11-13 17:47:57,775 INFO L78 Accepts]: Start accepts. Automaton has 19386 states and 28318 transitions. Word has length 190 [2021-11-13 17:47:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:57,778 INFO L470 AbstractCegarLoop]: Abstraction has 19386 states and 28318 transitions. [2021-11-13 17:47:57,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 17:47:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 19386 states and 28318 transitions. [2021-11-13 17:47:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 17:47:57,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:57,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-11-13 17:47:57,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:58,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 17:47:58,086 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:58,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:58,087 INFO L85 PathProgramCache]: Analyzing trace with hash -548011597, now seen corresponding path program 1 times [2021-11-13 17:47:58,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:58,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301464784] [2021-11-13 17:47:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:58,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:47:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:47:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:47:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:47:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:47:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 17:47:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 17:47:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-13 17:47:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 17:47:58,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:58,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301464784] [2021-11-13 17:47:58,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301464784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:58,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808024819] [2021-11-13 17:47:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:58,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:58,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:58,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:58,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:47:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:47:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 17:47:59,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:47:59,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808024819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:59,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:47:59,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:47:59,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104749711] [2021-11-13 17:47:59,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:59,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:59,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:59,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:59,139 INFO L87 Difference]: Start difference. First operand 19386 states and 28318 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 17:48:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:01,108 INFO L93 Difference]: Finished difference Result 57440 states and 84729 transitions. [2021-11-13 17:48:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:48:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 190 [2021-11-13 17:48:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:01,302 INFO L225 Difference]: With dead ends: 57440 [2021-11-13 17:48:01,302 INFO L226 Difference]: Without dead ends: 38074 [2021-11-13 17:48:01,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:01,393 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 161 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.05ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:01,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 539 Invalid, 12 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 9.05ms Time] [2021-11-13 17:48:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38074 states. [2021-11-13 17:48:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38074 to 37814. [2021-11-13 17:48:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37814 states, 33092 states have (on average 1.4489000362625408) internal successors, (47947), 33479 states have internal predecessors, (47947), 2877 states have call successors, (2877), 1525 states have call predecessors, (2877), 1844 states have return successors, (4246), 2817 states have call predecessors, (4246), 2875 states have call successors, (4246) [2021-11-13 17:48:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37814 states to 37814 states and 55070 transitions. [2021-11-13 17:48:03,961 INFO L78 Accepts]: Start accepts. Automaton has 37814 states and 55070 transitions. Word has length 190 [2021-11-13 17:48:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:03,962 INFO L470 AbstractCegarLoop]: Abstraction has 37814 states and 55070 transitions. [2021-11-13 17:48:03,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 17:48:03,963 INFO L276 IsEmpty]: Start isEmpty. Operand 37814 states and 55070 transitions. [2021-11-13 17:48:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-13 17:48:04,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:04,173 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:04,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:04,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 17:48:04,398 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:04,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1518125376, now seen corresponding path program 1 times [2021-11-13 17:48:04,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:04,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380360347] [2021-11-13 17:48:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:04,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:48:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:48:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:48:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:48:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:48:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 17:48:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 17:48:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:48:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 17:48:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:48:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-11-13 17:48:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-13 17:48:04,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:04,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380360347] [2021-11-13 17:48:04,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380360347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:04,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142807328] [2021-11-13 17:48:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:04,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:04,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:04,560 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:04,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:48:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:48:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 17:48:05,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:05,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142807328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:05,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:05,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 17:48:05,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065520077] [2021-11-13 17:48:05,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:05,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:48:05,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:05,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:48:05,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:05,229 INFO L87 Difference]: Start difference. First operand 37814 states and 55070 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 17:48:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:08,016 INFO L93 Difference]: Finished difference Result 80434 states and 118145 transitions. [2021-11-13 17:48:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:48:08,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 209 [2021-11-13 17:48:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:08,215 INFO L225 Difference]: With dead ends: 80434 [2021-11-13 17:48:08,215 INFO L226 Difference]: Without dead ends: 42642 [2021-11-13 17:48:08,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:08,325 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 186 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.27ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:08,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 318 Invalid, 11 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 11.27ms Time] [2021-11-13 17:48:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42642 states. [2021-11-13 17:48:11,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42642 to 42642. [2021-11-13 17:48:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42642 states, 37560 states have (on average 1.4125399361022364) internal successors, (53055), 37947 states have internal predecessors, (53055), 2993 states have call successors, (2993), 1769 states have call predecessors, (2993), 2088 states have return successors, (4414), 2933 states have call predecessors, (4414), 2991 states have call successors, (4414) [2021-11-13 17:48:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42642 states to 42642 states and 60462 transitions. [2021-11-13 17:48:11,561 INFO L78 Accepts]: Start accepts. Automaton has 42642 states and 60462 transitions. Word has length 209 [2021-11-13 17:48:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:11,562 INFO L470 AbstractCegarLoop]: Abstraction has 42642 states and 60462 transitions. [2021-11-13 17:48:11,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 17:48:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 42642 states and 60462 transitions. [2021-11-13 17:48:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-13 17:48:11,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:11,693 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:11,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:11,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:11,919 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1864163485, now seen corresponding path program 1 times [2021-11-13 17:48:11,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:11,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949234721] [2021-11-13 17:48:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:11,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:11,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:48:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:11,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:48:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:11,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:48:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:48:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:48:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 17:48:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 17:48:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:48:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 17:48:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:48:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-11-13 17:48:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 17:48:12,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:12,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949234721] [2021-11-13 17:48:12,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949234721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:12,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466204983] [2021-11-13 17:48:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:12,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:12,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:12,097 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:12,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:48:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:48:12,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 17:48:12,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:12,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466204983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:12,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:12,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 17:48:12,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493660689] [2021-11-13 17:48:12,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:12,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:48:12,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:12,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:48:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:12,976 INFO L87 Difference]: Start difference. First operand 42642 states and 60462 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 17:48:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:15,975 INFO L93 Difference]: Finished difference Result 79306 states and 111809 transitions. [2021-11-13 17:48:15,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:48:15,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 209 [2021-11-13 17:48:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:16,240 INFO L225 Difference]: With dead ends: 79306 [2021-11-13 17:48:16,241 INFO L226 Difference]: Without dead ends: 46970 [2021-11-13 17:48:16,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:16,321 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 185 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.22ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:16,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 545 Invalid, 10 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 10.22ms Time] [2021-11-13 17:48:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46970 states. [2021-11-13 17:48:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46970 to 46858. [2021-11-13 17:48:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46858 states, 41440 states have (on average 1.3847249034749034) internal successors, (57383), 41827 states have internal predecessors, (57383), 3097 states have call successors, (3097), 2001 states have call predecessors, (3097), 2320 states have return successors, (4750), 3037 states have call predecessors, (4750), 3095 states have call successors, (4750) [2021-11-13 17:48:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46858 states to 46858 states and 65230 transitions. [2021-11-13 17:48:20,360 INFO L78 Accepts]: Start accepts. Automaton has 46858 states and 65230 transitions. Word has length 209 [2021-11-13 17:48:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:20,361 INFO L470 AbstractCegarLoop]: Abstraction has 46858 states and 65230 transitions. [2021-11-13 17:48:20,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 17:48:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 46858 states and 65230 transitions. [2021-11-13 17:48:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-13 17:48:20,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:20,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 17:48:20,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:20,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 17:48:20,714 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:20,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1717834569, now seen corresponding path program 1 times [2021-11-13 17:48:20,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:20,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078366104] [2021-11-13 17:48:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:20,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:48:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:48:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:48:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:48:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:48:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 17:48:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:48:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 17:48:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-13 17:48:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:48:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-11-13 17:48:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 17:48:20,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:20,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078366104] [2021-11-13 17:48:20,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078366104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:20,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938227806] [2021-11-13 17:48:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:20,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:20,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:20,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:20,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:48:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:21,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:48:21,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 17:48:21,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:21,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938227806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:21,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:21,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 17:48:21,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659801936] [2021-11-13 17:48:21,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:21,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:48:21,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:21,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:48:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:21,480 INFO L87 Difference]: Start difference. First operand 46858 states and 65230 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 17:48:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:28,365 INFO L93 Difference]: Finished difference Result 138912 states and 195678 transitions. [2021-11-13 17:48:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:48:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 210 [2021-11-13 17:48:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:28,814 INFO L225 Difference]: With dead ends: 138912 [2021-11-13 17:48:28,815 INFO L226 Difference]: Without dead ends: 92076 [2021-11-13 17:48:28,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:28,972 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 234 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:28,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 773 Invalid, 13 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 13.75ms Time] [2021-11-13 17:48:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92076 states. [2021-11-13 17:48:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92076 to 92024. [2021-11-13 17:48:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92024 states, 81416 states have (on average 1.3790286921489634) internal successors, (112275), 82189 states have internal predecessors, (112275), 6015 states have call successors, (6015), 3953 states have call predecessors, (6015), 4592 states have return successors, (11382), 5897 states have call predecessors, (11382), 6013 states have call successors, (11382) [2021-11-13 17:48:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92024 states to 92024 states and 129672 transitions. [2021-11-13 17:48:37,734 INFO L78 Accepts]: Start accepts. Automaton has 92024 states and 129672 transitions. Word has length 210 [2021-11-13 17:48:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:37,735 INFO L470 AbstractCegarLoop]: Abstraction has 92024 states and 129672 transitions. [2021-11-13 17:48:37,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 17:48:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 92024 states and 129672 transitions. [2021-11-13 17:48:37,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-13 17:48:37,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:37,969 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 17:48:38,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-13 17:48:38,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:38,186 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:38,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1758137322, now seen corresponding path program 1 times [2021-11-13 17:48:38,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:38,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899372066] [2021-11-13 17:48:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:38,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:48:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:48:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:48:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:48:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:48:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 17:48:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:48:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 17:48:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-13 17:48:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:48:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-11-13 17:48:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 17:48:38,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:38,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899372066] [2021-11-13 17:48:38,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899372066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:38,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642701108] [2021-11-13 17:48:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:38,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:38,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:38,341 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:38,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3737ce9b-d21a-4832-a95c-3e445fabb50e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:48:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:48:38,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 17:48:38,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:38,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642701108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:38,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:38,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 17:48:38,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026316110] [2021-11-13 17:48:38,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:38,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:48:38,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:48:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:38,898 INFO L87 Difference]: Start difference. First operand 92024 states and 129672 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)