./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fee2fbeec3a60e447cd74345d2f8a46dc28fcea89eab2880c2a2ccd5802bfaa0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:14:16,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:14:16,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:14:16,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:14:16,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:14:16,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:14:16,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:14:16,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:14:16,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:14:16,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:14:16,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:14:16,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:14:16,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:14:16,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:14:16,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:14:16,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:14:16,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:14:16,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:14:16,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:14:16,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:14:16,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:14:16,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:14:16,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:14:16,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:14:16,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:14:16,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:14:16,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:14:16,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:14:16,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:14:16,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:14:16,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:14:16,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:14:16,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:14:16,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:14:16,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:14:16,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:14:16,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:14:16,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:14:16,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:14:16,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:14:16,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:14:16,106 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:14:16,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:14:16,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:14:16,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:14:16,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:14:16,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:14:16,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:14:16,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:14:16,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:14:16,139 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:14:16,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:14:16,139 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:14:16,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:14:16,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:14:16,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:14:16,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:14:16,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:14:16,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:14:16,141 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:14:16,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:14:16,141 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:14:16,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:14:16,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:14:16,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:14:16,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:14:16,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:14:16,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:14:16,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:14:16,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:14:16,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:14:16,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:14:16,144 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:14:16,144 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:14:16,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:14:16,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:14:16,145 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_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fee2fbeec3a60e447cd74345d2f8a46dc28fcea89eab2880c2a2ccd5802bfaa0 [2021-11-20 07:14:16,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:14:16,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:14:16,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:14:16,537 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:14:16,538 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:14:16,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2021-11-20 07:14:16,622 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/data/ea3afef37/15773693ef804eca8d454c2958e29028/FLAGfb1940946 [2021-11-20 07:14:17,218 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:14:17,221 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2021-11-20 07:14:17,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/data/ea3afef37/15773693ef804eca8d454c2958e29028/FLAGfb1940946 [2021-11-20 07:14:17,550 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/data/ea3afef37/15773693ef804eca8d454c2958e29028 [2021-11-20 07:14:17,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:14:17,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:14:17,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:14:17,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:14:17,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:14:17,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:14:17" (1/1) ... [2021-11-20 07:14:17,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb450cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:17, skipping insertion in model container [2021-11-20 07:14:17,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:14:17" (1/1) ... [2021-11-20 07:14:17,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:14:17,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:14:17,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[913,926] [2021-11-20 07:14:17,838 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[5977,5990] [2021-11-20 07:14:17,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:14:17,955 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:14:17,973 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[913,926] [2021-11-20 07:14:18,003 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[5977,5990] [2021-11-20 07:14:18,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:14:18,124 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:14:18,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18 WrapperNode [2021-11-20 07:14:18,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:14:18,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:14:18,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:14:18,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:14:18,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (1/1) ... [2021-11-20 07:14:18,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (1/1) ... [2021-11-20 07:14:18,218 INFO L137 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 707 [2021-11-20 07:14:18,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:14:18,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:14:18,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:14:18,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:14:18,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (1/1) ... [2021-11-20 07:14:18,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (1/1) ... [2021-11-20 07:14:18,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (1/1) ... [2021-11-20 07:14:18,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (1/1) ... [2021-11-20 07:14:18,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (1/1) ... [2021-11-20 07:14:18,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (1/1) ... [2021-11-20 07:14:18,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (1/1) ... [2021-11-20 07:14:18,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:14:18,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:14:18,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:14:18,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:14:18,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (1/1) ... [2021-11-20 07:14:18,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:14:18,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:18,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:14:18,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:14:18,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:14:18,425 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-20 07:14:18,425 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-20 07:14:18,425 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-11-20 07:14:18,426 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-11-20 07:14:18,426 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-20 07:14:18,426 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-20 07:14:18,426 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-20 07:14:18,426 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-20 07:14:18,427 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-20 07:14:18,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-20 07:14:18,427 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-20 07:14:18,427 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-20 07:14:18,427 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-20 07:14:18,428 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-20 07:14:18,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:14:18,428 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-20 07:14:18,428 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-20 07:14:18,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:14:18,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:14:18,429 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-20 07:14:18,429 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-20 07:14:18,536 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:14:18,538 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:14:19,263 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:14:19,276 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:14:19,281 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-20 07:14:19,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:14:19 BoogieIcfgContainer [2021-11-20 07:14:19,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:14:19,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:14:19,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:14:19,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:14:19,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:14:17" (1/3) ... [2021-11-20 07:14:19,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33afb966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:14:19, skipping insertion in model container [2021-11-20 07:14:19,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:18" (2/3) ... [2021-11-20 07:14:19,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33afb966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:14:19, skipping insertion in model container [2021-11-20 07:14:19,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:14:19" (3/3) ... [2021-11-20 07:14:19,298 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2021-11-20 07:14:19,304 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:14:19,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 07:14:19,367 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:14:19,374 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:14:19,375 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 07:14:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 266 states have (on average 1.6165413533834587) internal successors, (430), 271 states have internal predecessors, (430), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 07:14:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:14:19,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:19,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:19,419 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash 241616146, now seen corresponding path program 1 times [2021-11-20 07:14:19,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:19,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521212451] [2021-11-20 07:14:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:19,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:19,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:14:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:19,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:14:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:19,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:19,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521212451] [2021-11-20 07:14:19,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521212451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:19,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:19,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:14:19,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770174045] [2021-11-20 07:14:19,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:19,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:14:19,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:14:19,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:14:19,863 INFO L87 Difference]: Start difference. First operand has 304 states, 266 states have (on average 1.6165413533834587) internal successors, (430), 271 states have internal predecessors, (430), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:14:20,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:20,329 INFO L93 Difference]: Finished difference Result 659 states and 1044 transitions. [2021-11-20 07:14:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:14:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-11-20 07:14:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:20,383 INFO L225 Difference]: With dead ends: 659 [2021-11-20 07:14:20,384 INFO L226 Difference]: Without dead ends: 364 [2021-11-20 07:14:20,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:14:20,401 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 584 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:20,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 766 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:14:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-20 07:14:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 358. [2021-11-20 07:14:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 315 states have (on average 1.488888888888889) internal successors, (469), 319 states have internal predecessors, (469), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2021-11-20 07:14:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 533 transitions. [2021-11-20 07:14:20,537 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 533 transitions. Word has length 44 [2021-11-20 07:14:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:20,539 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 533 transitions. [2021-11-20 07:14:20,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:14:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 533 transitions. [2021-11-20 07:14:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:14:20,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:20,549 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] [2021-11-20 07:14:20,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:14:20,550 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash 283852217, now seen corresponding path program 1 times [2021-11-20 07:14:20,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:20,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136507585] [2021-11-20 07:14:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:20,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:20,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:14:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:20,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 07:14:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:20,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:20,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136507585] [2021-11-20 07:14:20,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136507585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:20,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:20,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:14:20,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976667947] [2021-11-20 07:14:20,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:20,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:14:20,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:20,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:14:20,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:14:20,724 INFO L87 Difference]: Start difference. First operand 358 states and 533 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:14:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:21,103 INFO L93 Difference]: Finished difference Result 606 states and 873 transitions. [2021-11-20 07:14:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:14:21,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 07:14:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:21,118 INFO L225 Difference]: With dead ends: 606 [2021-11-20 07:14:21,118 INFO L226 Difference]: Without dead ends: 482 [2021-11-20 07:14:21,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:14:21,126 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 248 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:21,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 990 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:14:21,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-20 07:14:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 425. [2021-11-20 07:14:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 376 states have (on average 1.4707446808510638) internal successors, (553), 380 states have internal predecessors, (553), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (37), 31 states have call predecessors, (37), 31 states have call successors, (37) [2021-11-20 07:14:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 623 transitions. [2021-11-20 07:14:21,180 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 623 transitions. Word has length 45 [2021-11-20 07:14:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:21,181 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 623 transitions. [2021-11-20 07:14:21,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:14:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 623 transitions. [2021-11-20 07:14:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:14:21,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:21,187 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] [2021-11-20 07:14:21,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:14:21,188 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:21,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1000505244, now seen corresponding path program 1 times [2021-11-20 07:14:21,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:21,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805023912] [2021-11-20 07:14:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:21,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:21,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:14:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:21,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 07:14:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:21,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805023912] [2021-11-20 07:14:21,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805023912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:21,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:21,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:14:21,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464182108] [2021-11-20 07:14:21,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:21,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:14:21,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:21,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:14:21,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:14:21,333 INFO L87 Difference]: Start difference. First operand 425 states and 623 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:14:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:21,557 INFO L93 Difference]: Finished difference Result 833 states and 1182 transitions. [2021-11-20 07:14:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:14:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 07:14:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:21,567 INFO L225 Difference]: With dead ends: 833 [2021-11-20 07:14:21,567 INFO L226 Difference]: Without dead ends: 642 [2021-11-20 07:14:21,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:14:21,577 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 593 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:21,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 764 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:14:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-20 07:14:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 590. [2021-11-20 07:14:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 522 states have (on average 1.4233716475095786) internal successors, (743), 529 states have internal predecessors, (743), 44 states have call successors, (44), 21 states have call predecessors, (44), 22 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2021-11-20 07:14:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 841 transitions. [2021-11-20 07:14:21,639 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 841 transitions. Word has length 45 [2021-11-20 07:14:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:21,640 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 841 transitions. [2021-11-20 07:14:21,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:14:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 841 transitions. [2021-11-20 07:14:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:14:21,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:21,642 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:14:21,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:14:21,643 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:21,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash 595494690, now seen corresponding path program 1 times [2021-11-20 07:14:21,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:21,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864896482] [2021-11-20 07:14:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:21,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:21,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:14:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:21,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:14:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:21,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:14:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:14:21,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864896482] [2021-11-20 07:14:21,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864896482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:21,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:21,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:14:21,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276681555] [2021-11-20 07:14:21,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:21,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:14:21,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:21,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:14:21,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:14:21,719 INFO L87 Difference]: Start difference. First operand 590 states and 841 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:14:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:22,112 INFO L93 Difference]: Finished difference Result 1174 states and 1626 transitions. [2021-11-20 07:14:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:14:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-11-20 07:14:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:22,132 INFO L225 Difference]: With dead ends: 1174 [2021-11-20 07:14:22,133 INFO L226 Difference]: Without dead ends: 818 [2021-11-20 07:14:22,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:14:22,141 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 232 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:22,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1023 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:14:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-20 07:14:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 780. [2021-11-20 07:14:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 688 states have (on average 1.370639534883721) internal successors, (943), 697 states have internal predecessors, (943), 58 states have call successors, (58), 29 states have call predecessors, (58), 32 states have return successors, (78), 54 states have call predecessors, (78), 56 states have call successors, (78) [2021-11-20 07:14:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1079 transitions. [2021-11-20 07:14:22,227 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1079 transitions. Word has length 62 [2021-11-20 07:14:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:22,229 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 1079 transitions. [2021-11-20 07:14:22,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:14:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1079 transitions. [2021-11-20 07:14:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:14:22,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:22,235 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:14:22,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:14:22,237 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:22,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1015259381, now seen corresponding path program 1 times [2021-11-20 07:14:22,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:22,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981565162] [2021-11-20 07:14:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:22,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:22,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:14:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:22,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:14:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:22,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 07:14:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:14:22,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:22,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981565162] [2021-11-20 07:14:22,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981565162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:22,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:22,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:14:22,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062243394] [2021-11-20 07:14:22,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:22,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:14:22,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:22,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:14:22,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:14:22,377 INFO L87 Difference]: Start difference. First operand 780 states and 1079 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:14:22,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:22,579 INFO L93 Difference]: Finished difference Result 1433 states and 1932 transitions. [2021-11-20 07:14:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:14:22,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-11-20 07:14:22,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:22,587 INFO L225 Difference]: With dead ends: 1433 [2021-11-20 07:14:22,587 INFO L226 Difference]: Without dead ends: 979 [2021-11-20 07:14:22,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:14:22,589 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 580 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:22,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 761 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:14:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-20 07:14:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 924. [2021-11-20 07:14:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 816 states have (on average 1.3406862745098038) internal successors, (1094), 827 states have internal predecessors, (1094), 66 states have call successors, (66), 35 states have call predecessors, (66), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2021-11-20 07:14:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1252 transitions. [2021-11-20 07:14:22,692 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1252 transitions. Word has length 67 [2021-11-20 07:14:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:22,692 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1252 transitions. [2021-11-20 07:14:22,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:14:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1252 transitions. [2021-11-20 07:14:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:14:22,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:22,696 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:14:22,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:14:22,696 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash -307618110, now seen corresponding path program 1 times [2021-11-20 07:14:22,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:22,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488823178] [2021-11-20 07:14:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:22,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:22,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:14:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:22,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:14:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:22,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:14:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:14:22,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:22,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488823178] [2021-11-20 07:14:22,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488823178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:14:22,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61669272] [2021-11-20 07:14:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:22,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:22,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:22,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:22,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:14:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:22,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:14:22,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:23,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:14:23,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61669272] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:14:23,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:14:23,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-11-20 07:14:23,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016267969] [2021-11-20 07:14:23,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:23,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:14:23,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:14:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:14:23,467 INFO L87 Difference]: Start difference. First operand 924 states and 1252 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:14:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:23,632 INFO L93 Difference]: Finished difference Result 980 states and 1320 transitions. [2021-11-20 07:14:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:14:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-11-20 07:14:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:23,639 INFO L225 Difference]: With dead ends: 980 [2021-11-20 07:14:23,639 INFO L226 Difference]: Without dead ends: 977 [2021-11-20 07:14:23,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:14:23,643 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 791 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:23,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 534 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:14:23,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-20 07:14:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 923. [2021-11-20 07:14:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 816 states have (on average 1.338235294117647) internal successors, (1092), 826 states have internal predecessors, (1092), 65 states have call successors, (65), 35 states have call predecessors, (65), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2021-11-20 07:14:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1249 transitions. [2021-11-20 07:14:23,724 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1249 transitions. Word has length 68 [2021-11-20 07:14:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:23,727 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1249 transitions. [2021-11-20 07:14:23,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:14:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1249 transitions. [2021-11-20 07:14:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 07:14:23,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:23,730 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:14:23,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:23,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:23,958 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:23,958 INFO L85 PathProgramCache]: Analyzing trace with hash -947179730, now seen corresponding path program 1 times [2021-11-20 07:14:23,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:23,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55176088] [2021-11-20 07:14:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:23,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:24,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:14:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:24,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:14:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:24,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:14:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:14:24,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:24,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55176088] [2021-11-20 07:14:24,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55176088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:14:24,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106848464] [2021-11-20 07:14:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:24,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:24,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:24,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:24,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:14:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:24,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:14:24,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:24,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:14:24,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106848464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:14:24,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:14:24,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-11-20 07:14:24,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110316878] [2021-11-20 07:14:24,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:24,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:14:24,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:24,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:14:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:14:24,800 INFO L87 Difference]: Start difference. First operand 923 states and 1249 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-20 07:14:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:26,375 INFO L93 Difference]: Finished difference Result 2623 states and 3469 transitions. [2021-11-20 07:14:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 07:14:26,376 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-11-20 07:14:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:26,390 INFO L225 Difference]: With dead ends: 2623 [2021-11-20 07:14:26,390 INFO L226 Difference]: Without dead ends: 2079 [2021-11-20 07:14:26,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 07:14:26,394 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 905 mSDsluCounter, 2741 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 3313 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:26,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [932 Valid, 3313 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:14:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-11-20 07:14:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1312. [2021-11-20 07:14:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1166 states have (on average 1.3087478559176673) internal successors, (1526), 1184 states have internal predecessors, (1526), 85 states have call successors, (85), 49 states have call predecessors, (85), 59 states have return successors, (126), 79 states have call predecessors, (126), 84 states have call successors, (126) [2021-11-20 07:14:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1737 transitions. [2021-11-20 07:14:26,531 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1737 transitions. Word has length 69 [2021-11-20 07:14:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:26,531 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1737 transitions. [2021-11-20 07:14:26,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-20 07:14:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1737 transitions. [2021-11-20 07:14:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 07:14:26,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:26,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:26,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:26,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:26,758 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:26,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash 172675214, now seen corresponding path program 1 times [2021-11-20 07:14:26,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:26,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759852302] [2021-11-20 07:14:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:26,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:26,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:14:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:26,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:14:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:26,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:14:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:26,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 07:14:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 07:14:26,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:26,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759852302] [2021-11-20 07:14:26,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759852302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:14:26,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439771291] [2021-11-20 07:14:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:26,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:26,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:26,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:26,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:14:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:26,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:14:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:14:27,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:14:27,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439771291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:27,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:14:27,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 07:14:27,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460479971] [2021-11-20 07:14:27,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:27,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:14:27,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:27,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:14:27,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:27,115 INFO L87 Difference]: Start difference. First operand 1312 states and 1737 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:14:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:27,220 INFO L93 Difference]: Finished difference Result 2035 states and 2675 transitions. [2021-11-20 07:14:27,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:14:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-11-20 07:14:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:27,230 INFO L225 Difference]: With dead ends: 2035 [2021-11-20 07:14:27,230 INFO L226 Difference]: Without dead ends: 1190 [2021-11-20 07:14:27,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:27,233 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 402 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:27,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 548 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:14:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-11-20 07:14:27,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1175. [2021-11-20 07:14:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1045 states have (on average 1.309090909090909) internal successors, (1368), 1062 states have internal predecessors, (1368), 77 states have call successors, (77), 43 states have call predecessors, (77), 51 states have return successors, (112), 70 states have call predecessors, (112), 76 states have call successors, (112) [2021-11-20 07:14:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1557 transitions. [2021-11-20 07:14:27,319 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1557 transitions. Word has length 88 [2021-11-20 07:14:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:27,319 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 1557 transitions. [2021-11-20 07:14:27,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:14:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1557 transitions. [2021-11-20 07:14:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 07:14:27,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:27,330 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:27,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:27,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 07:14:27,544 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:27,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:27,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1628325681, now seen corresponding path program 1 times [2021-11-20 07:14:27,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:27,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54539928] [2021-11-20 07:14:27,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:27,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:27,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:14:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:27,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:14:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:27,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:14:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 07:14:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:27,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:14:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:14:27,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:27,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54539928] [2021-11-20 07:14:27,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54539928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:14:27,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653571689] [2021-11-20 07:14:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:27,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:27,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:27,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:27,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:14:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:27,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:14:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:14:27,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:14:27,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653571689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:27,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:14:27,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 07:14:27,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112154356] [2021-11-20 07:14:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:27,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:14:27,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:27,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:14:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:27,971 INFO L87 Difference]: Start difference. First operand 1175 states and 1557 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:14:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:28,034 INFO L93 Difference]: Finished difference Result 1554 states and 2025 transitions. [2021-11-20 07:14:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:14:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-11-20 07:14:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:28,037 INFO L225 Difference]: With dead ends: 1554 [2021-11-20 07:14:28,038 INFO L226 Difference]: Without dead ends: 228 [2021-11-20 07:14:28,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:28,044 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 62 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:28,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 904 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:14:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-20 07:14:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-11-20 07:14:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 201 states have (on average 1.5422885572139304) internal successors, (310), 202 states have internal predecessors, (310), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-20 07:14:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 350 transitions. [2021-11-20 07:14:28,059 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 350 transitions. Word has length 103 [2021-11-20 07:14:28,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:28,059 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 350 transitions. [2021-11-20 07:14:28,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:14:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 350 transitions. [2021-11-20 07:14:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:28,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:28,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:28,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:28,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c806fdc1-e65b-47d3-ac7a-1b8edc899c8e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:28,281 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:28,281 INFO L85 PathProgramCache]: Analyzing trace with hash -678480864, now seen corresponding path program 1 times [2021-11-20 07:14:28,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:28,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546498341] [2021-11-20 07:14:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:28,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:28,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:28,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:28,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:28,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:28,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:28,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:28,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546498341] [2021-11-20 07:14:28,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546498341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:28,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:28,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:14:28,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621166305] [2021-11-20 07:14:28,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:28,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:14:28,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:28,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:14:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:14:28,419 INFO L87 Difference]: Start difference. First operand 228 states and 350 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:29,220 INFO L93 Difference]: Finished difference Result 522 states and 816 transitions. [2021-11-20 07:14:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:14:29,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:14:29,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:29,223 INFO L225 Difference]: With dead ends: 522 [2021-11-20 07:14:29,223 INFO L226 Difference]: Without dead ends: 304 [2021-11-20 07:14:29,225 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 [2021-11-20 07:14:29,225 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 577 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:29,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 631 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:14:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-20 07:14:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 228. [2021-11-20 07:14:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 201 states have (on average 1.537313432835821) internal successors, (309), 202 states have internal predecessors, (309), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-20 07:14:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 349 transitions. [2021-11-20 07:14:29,246 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 349 transitions. Word has length 112 [2021-11-20 07:14:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:29,247 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 349 transitions. [2021-11-20 07:14:29,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 349 transitions. [2021-11-20 07:14:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:29,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:29,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:29,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:14:29,249 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 628661534, now seen corresponding path program 1 times [2021-11-20 07:14:29,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:29,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455823902] [2021-11-20 07:14:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:29,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:29,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:29,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:29,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:29,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:29,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:29,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:29,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455823902] [2021-11-20 07:14:29,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455823902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:29,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:29,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:14:29,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215510451] [2021-11-20 07:14:29,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:29,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:14:29,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:14:29,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:14:29,381 INFO L87 Difference]: Start difference. First operand 228 states and 349 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:31,022 INFO L93 Difference]: Finished difference Result 812 states and 1276 transitions. [2021-11-20 07:14:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:14:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:14:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:31,027 INFO L225 Difference]: With dead ends: 812 [2021-11-20 07:14:31,027 INFO L226 Difference]: Without dead ends: 599 [2021-11-20 07:14:31,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:14:31,029 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 866 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:31,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1020 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 07:14:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-20 07:14:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 448. [2021-11-20 07:14:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 399 states have (on average 1.5513784461152882) internal successors, (619), 401 states have internal predecessors, (619), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2021-11-20 07:14:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 692 transitions. [2021-11-20 07:14:31,068 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 692 transitions. Word has length 112 [2021-11-20 07:14:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:31,069 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 692 transitions. [2021-11-20 07:14:31,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 692 transitions. [2021-11-20 07:14:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:31,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:31,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:31,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:14:31,072 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1907660194, now seen corresponding path program 1 times [2021-11-20 07:14:31,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:31,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581972149] [2021-11-20 07:14:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:31,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:31,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:31,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:31,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:31,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:31,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:31,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:31,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581972149] [2021-11-20 07:14:31,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581972149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:31,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:31,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:14:31,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950708773] [2021-11-20 07:14:31,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:31,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:14:31,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:14:31,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:31,198 INFO L87 Difference]: Start difference. First operand 448 states and 692 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:33,254 INFO L93 Difference]: Finished difference Result 1335 states and 2096 transitions. [2021-11-20 07:14:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:14:33,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:14:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:33,261 INFO L225 Difference]: With dead ends: 1335 [2021-11-20 07:14:33,261 INFO L226 Difference]: Without dead ends: 902 [2021-11-20 07:14:33,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:14:33,264 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 931 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:33,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 1261 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:14:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-11-20 07:14:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 653. [2021-11-20 07:14:33,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 582 states have (on average 1.5446735395189004) internal successors, (899), 585 states have internal predecessors, (899), 50 states have call successors, (50), 18 states have call predecessors, (50), 20 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-11-20 07:14:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1004 transitions. [2021-11-20 07:14:33,321 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1004 transitions. Word has length 112 [2021-11-20 07:14:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:33,321 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1004 transitions. [2021-11-20 07:14:33,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1004 transitions. [2021-11-20 07:14:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:33,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:33,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:33,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:14:33,324 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash 288685280, now seen corresponding path program 1 times [2021-11-20 07:14:33,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095562481] [2021-11-20 07:14:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:33,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:33,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:33,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:33,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:33,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:33,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:33,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:33,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095562481] [2021-11-20 07:14:33,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095562481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:33,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:33,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:14:33,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102964802] [2021-11-20 07:14:33,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:33,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:14:33,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:14:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:33,443 INFO L87 Difference]: Start difference. First operand 653 states and 1004 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:35,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:35,510 INFO L93 Difference]: Finished difference Result 2104 states and 3296 transitions. [2021-11-20 07:14:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:14:35,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:14:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:35,521 INFO L225 Difference]: With dead ends: 2104 [2021-11-20 07:14:35,521 INFO L226 Difference]: Without dead ends: 1466 [2021-11-20 07:14:35,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:14:35,524 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 875 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:35,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1715 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:14:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-11-20 07:14:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1067. [2021-11-20 07:14:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 952 states have (on average 1.5399159663865547) internal successors, (1466), 957 states have internal predecessors, (1466), 80 states have call successors, (80), 30 states have call predecessors, (80), 34 states have return successors, (93), 83 states have call predecessors, (93), 80 states have call successors, (93) [2021-11-20 07:14:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1639 transitions. [2021-11-20 07:14:35,620 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1639 transitions. Word has length 112 [2021-11-20 07:14:35,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:35,621 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1639 transitions. [2021-11-20 07:14:35,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1639 transitions. [2021-11-20 07:14:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:35,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:35,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:35,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:14:35,624 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:35,625 INFO L85 PathProgramCache]: Analyzing trace with hash 260184990, now seen corresponding path program 1 times [2021-11-20 07:14:35,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:35,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313150058] [2021-11-20 07:14:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:35,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:35,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:35,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:35,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:35,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:35,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:35,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:35,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313150058] [2021-11-20 07:14:35,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313150058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:35,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:35,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:14:35,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133497147] [2021-11-20 07:14:35,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:35,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:14:35,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:14:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:35,758 INFO L87 Difference]: Start difference. First operand 1067 states and 1639 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:37,870 INFO L93 Difference]: Finished difference Result 3592 states and 5607 transitions. [2021-11-20 07:14:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:14:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:14:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:37,888 INFO L225 Difference]: With dead ends: 3592 [2021-11-20 07:14:37,888 INFO L226 Difference]: Without dead ends: 2540 [2021-11-20 07:14:37,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:14:37,893 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 871 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:37,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1710 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:14:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-11-20 07:14:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1896. [2021-11-20 07:14:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1693 states have (on average 1.5357353809805079) internal successors, (2600), 1702 states have internal predecessors, (2600), 140 states have call successors, (140), 54 states have call predecessors, (140), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2021-11-20 07:14:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2915 transitions. [2021-11-20 07:14:38,079 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2915 transitions. Word has length 112 [2021-11-20 07:14:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:38,080 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 2915 transitions. [2021-11-20 07:14:38,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2915 transitions. [2021-11-20 07:14:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:38,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:38,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:38,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:14:38,083 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1680397024, now seen corresponding path program 1 times [2021-11-20 07:14:38,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:38,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121064313] [2021-11-20 07:14:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:38,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:38,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:38,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:38,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:38,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:38,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:38,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:38,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121064313] [2021-11-20 07:14:38,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121064313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:38,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:38,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:14:38,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428798719] [2021-11-20 07:14:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:38,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:14:38,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:14:38,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:38,215 INFO L87 Difference]: Start difference. First operand 1896 states and 2915 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:39,363 INFO L93 Difference]: Finished difference Result 4428 states and 6920 transitions. [2021-11-20 07:14:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:14:39,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:14:39,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:39,387 INFO L225 Difference]: With dead ends: 4428 [2021-11-20 07:14:39,387 INFO L226 Difference]: Without dead ends: 2547 [2021-11-20 07:14:39,395 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 [2021-11-20 07:14:39,396 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 631 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:39,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 901 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:14:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-11-20 07:14:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 1896. [2021-11-20 07:14:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1693 states have (on average 1.5304193738924985) internal successors, (2591), 1702 states have internal predecessors, (2591), 140 states have call successors, (140), 54 states have call predecessors, (140), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2021-11-20 07:14:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2906 transitions. [2021-11-20 07:14:39,615 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2906 transitions. Word has length 112 [2021-11-20 07:14:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:39,616 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 2906 transitions. [2021-11-20 07:14:39,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2906 transitions. [2021-11-20 07:14:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:39,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:39,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:39,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:14:39,620 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:39,620 INFO L85 PathProgramCache]: Analyzing trace with hash 196666206, now seen corresponding path program 1 times [2021-11-20 07:14:39,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:39,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093633379] [2021-11-20 07:14:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:39,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:39,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:39,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:39,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:39,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:39,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:39,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:39,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093633379] [2021-11-20 07:14:39,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093633379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:39,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:39,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:14:39,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165162585] [2021-11-20 07:14:39,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:39,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:14:39,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:14:39,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:39,742 INFO L87 Difference]: Start difference. First operand 1896 states and 2906 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:41,950 INFO L93 Difference]: Finished difference Result 6557 states and 10181 transitions. [2021-11-20 07:14:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:14:41,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:14:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:41,984 INFO L225 Difference]: With dead ends: 6557 [2021-11-20 07:14:41,984 INFO L226 Difference]: Without dead ends: 4676 [2021-11-20 07:14:41,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:14:41,993 INFO L933 BasicCegarLoop]: 546 mSDtfsCounter, 863 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:41,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 1699 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 07:14:42,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-11-20 07:14:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 3570. [2021-11-20 07:14:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3570 states, 3191 states have (on average 1.5264807270448135) internal successors, (4871), 3208 states have internal predecessors, (4871), 260 states have call successors, (260), 102 states have call predecessors, (260), 118 states have return successors, (357), 275 states have call predecessors, (357), 260 states have call successors, (357) [2021-11-20 07:14:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3570 states to 3570 states and 5488 transitions. [2021-11-20 07:14:42,356 INFO L78 Accepts]: Start accepts. Automaton has 3570 states and 5488 transitions. Word has length 112 [2021-11-20 07:14:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:42,357 INFO L470 AbstractCegarLoop]: Abstraction has 3570 states and 5488 transitions. [2021-11-20 07:14:42,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3570 states and 5488 transitions. [2021-11-20 07:14:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:42,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:42,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:42,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:14:42,362 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:42,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:42,362 INFO L85 PathProgramCache]: Analyzing trace with hash -574067360, now seen corresponding path program 1 times [2021-11-20 07:14:42,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:42,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351175581] [2021-11-20 07:14:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:42,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:42,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:42,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:42,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:42,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:42,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:42,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:42,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351175581] [2021-11-20 07:14:42,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351175581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:42,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:42,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:14:42,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191393383] [2021-11-20 07:14:42,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:42,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:14:42,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:42,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:14:42,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:42,500 INFO L87 Difference]: Start difference. First operand 3570 states and 5488 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:45,244 INFO L93 Difference]: Finished difference Result 13997 states and 21715 transitions. [2021-11-20 07:14:45,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:14:45,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:14:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:45,312 INFO L225 Difference]: With dead ends: 13997 [2021-11-20 07:14:45,312 INFO L226 Difference]: Without dead ends: 10442 [2021-11-20 07:14:45,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:14:45,329 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 925 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:45,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 1788 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:14:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2021-11-20 07:14:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 6883. [2021-11-20 07:14:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6883 states, 6168 states have (on average 1.5267509727626458) internal successors, (9417), 6201 states have internal predecessors, (9417), 484 states have call successors, (484), 198 states have call predecessors, (484), 230 states have return successors, (759), 515 states have call predecessors, (759), 484 states have call successors, (759) [2021-11-20 07:14:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6883 states to 6883 states and 10660 transitions. [2021-11-20 07:14:46,155 INFO L78 Accepts]: Start accepts. Automaton has 6883 states and 10660 transitions. Word has length 112 [2021-11-20 07:14:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:46,156 INFO L470 AbstractCegarLoop]: Abstraction has 6883 states and 10660 transitions. [2021-11-20 07:14:46,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6883 states and 10660 transitions. [2021-11-20 07:14:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:46,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:46,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:46,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:14:46,167 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1568761058, now seen corresponding path program 1 times [2021-11-20 07:14:46,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:46,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837876299] [2021-11-20 07:14:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:46,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:46,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:46,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:46,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:46,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:46,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:46,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:46,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837876299] [2021-11-20 07:14:46,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837876299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:46,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:46,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:14:46,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134945028] [2021-11-20 07:14:46,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:46,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:14:46,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:46,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:14:46,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:46,276 INFO L87 Difference]: Start difference. First operand 6883 states and 10660 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:49,578 INFO L93 Difference]: Finished difference Result 26860 states and 41929 transitions. [2021-11-20 07:14:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:14:49,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:14:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:49,672 INFO L225 Difference]: With dead ends: 26860 [2021-11-20 07:14:49,672 INFO L226 Difference]: Without dead ends: 19992 [2021-11-20 07:14:49,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:14:49,710 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 1073 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:49,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1093 Valid, 1675 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 07:14:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19992 states. [2021-11-20 07:14:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19992 to 13332. [2021-11-20 07:14:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13332 states, 11961 states have (on average 1.527213443691999) internal successors, (18267), 12026 states have internal predecessors, (18267), 916 states have call successors, (916), 390 states have call predecessors, (916), 454 states have return successors, (1709), 979 states have call predecessors, (1709), 916 states have call successors, (1709) [2021-11-20 07:14:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13332 states to 13332 states and 20892 transitions. [2021-11-20 07:14:51,149 INFO L78 Accepts]: Start accepts. Automaton has 13332 states and 20892 transitions. Word has length 112 [2021-11-20 07:14:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:51,151 INFO L470 AbstractCegarLoop]: Abstraction has 13332 states and 20892 transitions. [2021-11-20 07:14:51,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 13332 states and 20892 transitions. [2021-11-20 07:14:51,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:51,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:51,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:51,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:14:51,172 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2139930016, now seen corresponding path program 1 times [2021-11-20 07:14:51,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:51,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396959566] [2021-11-20 07:14:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:51,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:51,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:51,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:51,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:51,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:51,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:51,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396959566] [2021-11-20 07:14:51,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396959566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:51,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:51,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:14:51,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756457447] [2021-11-20 07:14:51,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:51,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:14:51,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:51,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:14:51,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:51,299 INFO L87 Difference]: Start difference. First operand 13332 states and 20892 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:55,967 INFO L93 Difference]: Finished difference Result 51515 states and 81263 transitions. [2021-11-20 07:14:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:14:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:14:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:56,155 INFO L225 Difference]: With dead ends: 51515 [2021-11-20 07:14:56,156 INFO L226 Difference]: Without dead ends: 38198 [2021-11-20 07:14:56,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:14:56,221 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 1087 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:56,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1107 Valid, 1163 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 07:14:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38198 states. [2021-11-20 07:14:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38198 to 26357. [2021-11-20 07:14:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26357 states, 23706 states have (on average 1.5292752889563823) internal successors, (36253), 23835 states have internal predecessors, (36253), 1748 states have call successors, (1748), 774 states have call predecessors, (1748), 902 states have return successors, (4063), 1875 states have call predecessors, (4063), 1748 states have call successors, (4063) [2021-11-20 07:14:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26357 states to 26357 states and 42064 transitions. [2021-11-20 07:14:59,330 INFO L78 Accepts]: Start accepts. Automaton has 26357 states and 42064 transitions. Word has length 112 [2021-11-20 07:14:59,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:59,331 INFO L470 AbstractCegarLoop]: Abstraction has 26357 states and 42064 transitions. [2021-11-20 07:14:59,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:14:59,331 INFO L276 IsEmpty]: Start isEmpty. Operand 26357 states and 42064 transitions. [2021-11-20 07:14:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:14:59,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:59,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:59,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 07:14:59,361 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash 181355230, now seen corresponding path program 1 times [2021-11-20 07:14:59,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:59,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476335404] [2021-11-20 07:14:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:59,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:59,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:14:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:59,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:14:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:59,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:14:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:59,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:14:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:59,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:14:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:59,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:59,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476335404] [2021-11-20 07:14:59,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476335404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:59,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:59,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:14:59,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082083559] [2021-11-20 07:14:59,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:59,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:14:59,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:59,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:14:59,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:14:59,482 INFO L87 Difference]: Start difference. First operand 26357 states and 42064 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:15:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:06,461 INFO L93 Difference]: Finished difference Result 98136 states and 157873 transitions. [2021-11-20 07:15:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:15:06,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:15:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:06,803 INFO L225 Difference]: With dead ends: 98136 [2021-11-20 07:15:06,803 INFO L226 Difference]: Without dead ends: 71794 [2021-11-20 07:15:06,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:15:06,909 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 954 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:06,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1663 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 07:15:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71794 states. [2021-11-20 07:15:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71794 to 52471. [2021-11-20 07:15:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52471 states, 47324 states have (on average 1.5329431155439102) internal successors, (72545), 47581 states have internal predecessors, (72545), 3348 states have call successors, (3348), 1542 states have call predecessors, (3348), 1798 states have return successors, (10165), 3603 states have call predecessors, (10165), 3348 states have call successors, (10165) [2021-11-20 07:15:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52471 states to 52471 states and 86058 transitions. [2021-11-20 07:15:11,671 INFO L78 Accepts]: Start accepts. Automaton has 52471 states and 86058 transitions. Word has length 112 [2021-11-20 07:15:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:11,672 INFO L470 AbstractCegarLoop]: Abstraction has 52471 states and 86058 transitions. [2021-11-20 07:15:11,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:15:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 52471 states and 86058 transitions. [2021-11-20 07:15:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:15:11,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:11,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:11,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 07:15:11,719 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1697775716, now seen corresponding path program 1 times [2021-11-20 07:15:11,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:11,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965924937] [2021-11-20 07:15:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:11,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:15:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:15:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:15:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:15:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:15:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:11,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:11,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965924937] [2021-11-20 07:15:11,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965924937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:11,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:11,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:15:11,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066021864] [2021-11-20 07:15:11,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:11,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:15:11,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:15:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:15:11,826 INFO L87 Difference]: Start difference. First operand 52471 states and 86058 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:15:24,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:24,041 INFO L93 Difference]: Finished difference Result 191064 states and 316233 transitions. [2021-11-20 07:15:24,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:15:24,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-11-20 07:15:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:24,821 INFO L225 Difference]: With dead ends: 191064 [2021-11-20 07:15:24,822 INFO L226 Difference]: Without dead ends: 138608 [2021-11-20 07:15:25,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:15:25,473 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 870 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:25,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1686 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:15:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138608 states. [2021-11-20 07:15:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138608 to 104568. [2021-11-20 07:15:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104568 states, 94557 states have (on average 1.5361210698308956) internal successors, (145251), 95070 states have internal predecessors, (145251), 6420 states have call successors, (6420), 3078 states have call predecessors, (6420), 3590 states have return successors, (26615), 6931 states have call predecessors, (26615), 6420 states have call successors, (26615) [2021-11-20 07:15:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104568 states to 104568 states and 178286 transitions. [2021-11-20 07:15:34,138 INFO L78 Accepts]: Start accepts. Automaton has 104568 states and 178286 transitions. Word has length 112 [2021-11-20 07:15:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:34,138 INFO L470 AbstractCegarLoop]: Abstraction has 104568 states and 178286 transitions. [2021-11-20 07:15:34,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:15:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 104568 states and 178286 transitions. [2021-11-20 07:15:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:15:34,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:34,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:34,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 07:15:34,233 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash -372919522, now seen corresponding path program 1 times [2021-11-20 07:15:34,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:34,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019171330] [2021-11-20 07:15:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:34,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:34,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:15:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:34,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:15:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:34,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:15:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:34,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:15:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:34,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:15:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:34,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:34,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019171330] [2021-11-20 07:15:34,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019171330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:34,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:34,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:15:34,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643696672] [2021-11-20 07:15:34,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:34,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:15:34,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:34,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:15:34,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:15:34,347 INFO L87 Difference]: Start difference. First operand 104568 states and 178286 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)