./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ --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 d5746a53d1ab0f7d20d2e5362b7235e80167d7cee80ddadf160c57caf25829fe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:30:56,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:30:56,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:30:56,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:30:56,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:30:56,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:30:56,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:30:56,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:30:56,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:30:56,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:30:56,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:30:56,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:30:56,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:30:56,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:30:56,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:30:56,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:30:56,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:30:56,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:30:56,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:30:56,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:30:56,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:30:56,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:30:56,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:30:56,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:30:56,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:30:56,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:30:56,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:30:56,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:30:56,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:30:56,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:30:56,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:30:56,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:30:56,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:30:56,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:30:56,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:30:56,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:30:56,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:30:56,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:30:56,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:30:56,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:30:56,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:30:56,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:30:56,259 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:30:56,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:30:56,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:30:56,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:30:56,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:30:56,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:30:56,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:30:56,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:30:56,265 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:30:56,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:30:56,267 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:30:56,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:30:56,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:30:56,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:30:56,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:30:56,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:30:56,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:30:56,269 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:30:56,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:30:56,270 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:30:56,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:30:56,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:30:56,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:30:56,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:30:56,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:30:56,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:30:56,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:30:56,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:30:56,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:30:56,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:30:56,275 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:30:56,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:30:56,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:30:56,276 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_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5746a53d1ab0f7d20d2e5362b7235e80167d7cee80ddadf160c57caf25829fe [2022-10-17 10:30:56,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:30:56,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:30:56,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:30:56,693 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:30:56,694 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:30:56,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c [2022-10-17 10:30:56,781 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/data/6a0927db1/b32f57d54cb74ce89db053afc049fd4d/FLAG27510568a [2022-10-17 10:30:57,351 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:30:57,352 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c [2022-10-17 10:30:57,385 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/data/6a0927db1/b32f57d54cb74ce89db053afc049fd4d/FLAG27510568a [2022-10-17 10:30:57,662 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/data/6a0927db1/b32f57d54cb74ce89db053afc049fd4d [2022-10-17 10:30:57,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:30:57,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:30:57,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:30:57,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:30:57,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:30:57,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:30:57" (1/1) ... [2022-10-17 10:30:57,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28db482a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:57, skipping insertion in model container [2022-10-17 10:30:57,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:30:57" (1/1) ... [2022-10-17 10:30:57,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:30:57,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:30:58,070 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_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c[913,926] [2022-10-17 10:30:58,142 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_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c[5977,5990] [2022-10-17 10:30:58,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:30:58,207 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:30:58,221 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_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c[913,926] [2022-10-17 10:30:58,267 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_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c[5977,5990] [2022-10-17 10:30:58,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:30:58,346 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:30:58,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58 WrapperNode [2022-10-17 10:30:58,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:30:58,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:30:58,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:30:58,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:30:58,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,411 INFO L138 Inliner]: procedures = 54, calls = 58, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 538 [2022-10-17 10:30:58,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:30:58,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:30:58,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:30:58,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:30:58,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:30:58,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:30:58,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:30:58,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:30:58,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (1/1) ... [2022-10-17 10:30:58,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:30:58,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:30:58,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:30:58,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:30:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:30:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 10:30:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 10:30:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-10-17 10:30:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-10-17 10:30:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-10-17 10:30:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-10-17 10:30:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-10-17 10:30:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-10-17 10:30:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-10-17 10:30:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-10-17 10:30:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-10-17 10:30:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-10-17 10:30:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-10-17 10:30:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-10-17 10:30:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:30:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-10-17 10:30:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-10-17 10:30:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:30:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:30:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-10-17 10:30:58,596 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-10-17 10:30:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-10-17 10:30:58,596 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-10-17 10:30:58,708 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:30:58,710 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:30:59,467 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:30:59,478 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:30:59,479 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-10-17 10:30:59,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:30:59 BoogieIcfgContainer [2022-10-17 10:30:59,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:30:59,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:30:59,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:30:59,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:30:59,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:30:57" (1/3) ... [2022-10-17 10:30:59,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449dab91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:30:59, skipping insertion in model container [2022-10-17 10:30:59,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:58" (2/3) ... [2022-10-17 10:30:59,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449dab91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:30:59, skipping insertion in model container [2022-10-17 10:30:59,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:30:59" (3/3) ... [2022-10-17 10:30:59,491 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.03.cil-1.c [2022-10-17 10:30:59,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:30:59,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 10:30:59,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:30:59,577 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@798069cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:30:59,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 10:30:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 237 states, 199 states have (on average 1.592964824120603) internal successors, (317), 206 states have internal predecessors, (317), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-10-17 10:30:59,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 10:30:59,595 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:59,596 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:30:59,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:30:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:59,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1832472135, now seen corresponding path program 1 times [2022-10-17 10:30:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:59,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276893631] [2022-10-17 10:30:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:59,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:30:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:30:59,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:30:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:00,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-17 10:31:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:00,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:00,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276893631] [2022-10-17 10:31:00,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276893631] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:00,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:00,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:00,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961266208] [2022-10-17 10:31:00,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:00,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:00,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:00,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:00,078 INFO L87 Difference]: Start difference. First operand has 237 states, 199 states have (on average 1.592964824120603) internal successors, (317), 206 states have internal predecessors, (317), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) 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) [2022-10-17 10:31:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:00,528 INFO L93 Difference]: Finished difference Result 527 states and 820 transitions. [2022-10-17 10:31:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:00,532 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 [2022-10-17 10:31:00,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:00,560 INFO L225 Difference]: With dead ends: 527 [2022-10-17 10:31:00,560 INFO L226 Difference]: Without dead ends: 296 [2022-10-17 10:31:00,566 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:31:00,571 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 417 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:00,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 610 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:31:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-10-17 10:31:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2022-10-17 10:31:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 248 states have (on average 1.4596774193548387) internal successors, (362), 253 states have internal predecessors, (362), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2022-10-17 10:31:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 422 transitions. [2022-10-17 10:31:00,713 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 422 transitions. Word has length 44 [2022-10-17 10:31:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:00,714 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 422 transitions. [2022-10-17 10:31:00,716 INFO L496 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) [2022-10-17 10:31:00,716 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 422 transitions. [2022-10-17 10:31:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:31:00,726 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:00,726 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:00,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:31:00,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash -882534523, now seen corresponding path program 1 times [2022-10-17 10:31:00,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:00,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627441951] [2022-10-17 10:31:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:00,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:00,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:00,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:31:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:00,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:00,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627441951] [2022-10-17 10:31:00,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627441951] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:00,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:00,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:00,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116000068] [2022-10-17 10:31:00,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:00,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:00,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:00,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:00,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:00,967 INFO L87 Difference]: Start difference. First operand 290 states and 422 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) [2022-10-17 10:31:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:01,332 INFO L93 Difference]: Finished difference Result 538 states and 762 transitions. [2022-10-17 10:31:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:01,333 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 [2022-10-17 10:31:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:01,341 INFO L225 Difference]: With dead ends: 538 [2022-10-17 10:31:01,342 INFO L226 Difference]: Without dead ends: 414 [2022-10-17 10:31:01,346 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:31:01,348 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 189 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:01,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 760 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:31:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-10-17 10:31:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 357. [2022-10-17 10:31:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 309 states have (on average 1.4433656957928802) internal successors, (446), 314 states have internal predecessors, (446), 32 states have call successors, (32), 15 states have call predecessors, (32), 14 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2022-10-17 10:31:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 512 transitions. [2022-10-17 10:31:01,410 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 512 transitions. Word has length 45 [2022-10-17 10:31:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:01,410 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 512 transitions. [2022-10-17 10:31:01,410 INFO L496 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) [2022-10-17 10:31:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 512 transitions. [2022-10-17 10:31:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:31:01,426 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:01,426 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:01,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:31:01,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2128075312, now seen corresponding path program 1 times [2022-10-17 10:31:01,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:01,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129724558] [2022-10-17 10:31:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:01,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:01,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:01,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:31:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:01,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:01,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129724558] [2022-10-17 10:31:01,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129724558] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:01,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:01,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:01,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013976468] [2022-10-17 10:31:01,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:01,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:01,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:01,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:01,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:01,570 INFO L87 Difference]: Start difference. First operand 357 states and 512 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) [2022-10-17 10:31:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:01,800 INFO L93 Difference]: Finished difference Result 765 states and 1071 transitions. [2022-10-17 10:31:01,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:01,801 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 [2022-10-17 10:31:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:01,807 INFO L225 Difference]: With dead ends: 765 [2022-10-17 10:31:01,807 INFO L226 Difference]: Without dead ends: 574 [2022-10-17 10:31:01,811 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:31:01,819 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 426 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:01,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 603 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-10-17 10:31:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 522. [2022-10-17 10:31:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 455 states have (on average 1.3978021978021977) internal successors, (636), 463 states have internal predecessors, (636), 43 states have call successors, (43), 22 states have call predecessors, (43), 22 states have return successors, (51), 37 states have call predecessors, (51), 39 states have call successors, (51) [2022-10-17 10:31:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 730 transitions. [2022-10-17 10:31:01,890 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 730 transitions. Word has length 45 [2022-10-17 10:31:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:01,891 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 730 transitions. [2022-10-17 10:31:01,893 INFO L496 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) [2022-10-17 10:31:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 730 transitions. [2022-10-17 10:31:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 10:31:01,897 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:01,898 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:01,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:31:01,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:01,899 INFO L85 PathProgramCache]: Analyzing trace with hash 888089079, now seen corresponding path program 1 times [2022-10-17 10:31:01,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:01,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829166110] [2022-10-17 10:31:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:01,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:02,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:02,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 10:31:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:02,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-17 10:31:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:31:02,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:02,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829166110] [2022-10-17 10:31:02,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829166110] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:02,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:02,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:02,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981033237] [2022-10-17 10:31:02,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:02,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:02,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:02,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:02,069 INFO L87 Difference]: Start difference. First operand 522 states and 730 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) [2022-10-17 10:31:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:02,466 INFO L93 Difference]: Finished difference Result 1106 states and 1515 transitions. [2022-10-17 10:31:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:02,467 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 [2022-10-17 10:31:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:02,473 INFO L225 Difference]: With dead ends: 1106 [2022-10-17 10:31:02,473 INFO L226 Difference]: Without dead ends: 750 [2022-10-17 10:31:02,475 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:31:02,484 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 173 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:02,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 815 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:31:02,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-10-17 10:31:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 712. [2022-10-17 10:31:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 621 states have (on average 1.3462157809983897) internal successors, (836), 631 states have internal predecessors, (836), 57 states have call successors, (57), 30 states have call predecessors, (57), 32 states have return successors, (75), 51 states have call predecessors, (75), 53 states have call successors, (75) [2022-10-17 10:31:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 968 transitions. [2022-10-17 10:31:02,578 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 968 transitions. Word has length 62 [2022-10-17 10:31:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:02,580 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 968 transitions. [2022-10-17 10:31:02,580 INFO L496 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) [2022-10-17 10:31:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 968 transitions. [2022-10-17 10:31:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-17 10:31:02,586 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:02,587 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:02,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:31:02,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash 306547218, now seen corresponding path program 1 times [2022-10-17 10:31:02,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:02,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067795904] [2022-10-17 10:31:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:02,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:02,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:02,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:31:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:02,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-10-17 10:31:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 10:31:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067795904] [2022-10-17 10:31:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067795904] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:02,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:02,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:02,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793916124] [2022-10-17 10:31:02,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:02,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:02,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:02,719 INFO L87 Difference]: Start difference. First operand 712 states and 968 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) [2022-10-17 10:31:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:02,953 INFO L93 Difference]: Finished difference Result 1365 states and 1821 transitions. [2022-10-17 10:31:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:02,954 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 [2022-10-17 10:31:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:02,963 INFO L225 Difference]: With dead ends: 1365 [2022-10-17 10:31:02,964 INFO L226 Difference]: Without dead ends: 911 [2022-10-17 10:31:02,966 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:31:02,967 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 413 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:02,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 600 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-10-17 10:31:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 856. [2022-10-17 10:31:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 749 states have (on average 1.3177570093457944) internal successors, (987), 761 states have internal predecessors, (987), 65 states have call successors, (65), 36 states have call predecessors, (65), 40 states have return successors, (89), 59 states have call predecessors, (89), 61 states have call successors, (89) [2022-10-17 10:31:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1141 transitions. [2022-10-17 10:31:03,062 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1141 transitions. Word has length 67 [2022-10-17 10:31:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:03,063 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1141 transitions. [2022-10-17 10:31:03,063 INFO L496 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) [2022-10-17 10:31:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1141 transitions. [2022-10-17 10:31:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-17 10:31:03,066 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:03,066 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:03,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:31:03,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:03,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:03,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1645428910, now seen corresponding path program 1 times [2022-10-17 10:31:03,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:03,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042355390] [2022-10-17 10:31:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:03,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:03,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:03,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:03,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:31:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:31:03,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042355390] [2022-10-17 10:31:03,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042355390] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460014138] [2022-10-17 10:31:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:03,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:03,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:03,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:03,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:31:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:31:03,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:03,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:31:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:31:03,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460014138] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:03,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:31:03,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-10-17 10:31:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799458510] [2022-10-17 10:31:03,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:03,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:03,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:31:03,697 INFO L87 Difference]: Start difference. First operand 856 states and 1141 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) [2022-10-17 10:31:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:03,899 INFO L93 Difference]: Finished difference Result 912 states and 1209 transitions. [2022-10-17 10:31:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:31:03,899 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 [2022-10-17 10:31:03,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:03,907 INFO L225 Difference]: With dead ends: 912 [2022-10-17 10:31:03,907 INFO L226 Difference]: Without dead ends: 909 [2022-10-17 10:31:03,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:31:03,911 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 577 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:03,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 423 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:03,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-10-17 10:31:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 855. [2022-10-17 10:31:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 749 states have (on average 1.315086782376502) internal successors, (985), 760 states have internal predecessors, (985), 64 states have call successors, (64), 36 states have call predecessors, (64), 40 states have return successors, (89), 59 states have call predecessors, (89), 61 states have call successors, (89) [2022-10-17 10:31:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1138 transitions. [2022-10-17 10:31:04,033 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1138 transitions. Word has length 68 [2022-10-17 10:31:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:04,036 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1138 transitions. [2022-10-17 10:31:04,036 INFO L496 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) [2022-10-17 10:31:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1138 transitions. [2022-10-17 10:31:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-10-17 10:31:04,039 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:04,039 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:04,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:04,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:31:04,254 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash 530550805, now seen corresponding path program 1 times [2022-10-17 10:31:04,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:04,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599833737] [2022-10-17 10:31:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:04,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:04,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:04,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:04,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:31:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:31:04,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599833737] [2022-10-17 10:31:04,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599833737] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783019589] [2022-10-17 10:31:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:04,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:04,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:04,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:04,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:31:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:04,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:31:04,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:04,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:31:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:31:04,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783019589] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:31:04,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:31:04,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-10-17 10:31:04,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283911866] [2022-10-17 10:31:04,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:31:04,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:31:04,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:04,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:31:04,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:31:04,962 INFO L87 Difference]: Start difference. First operand 855 states and 1138 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) [2022-10-17 10:31:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:06,556 INFO L93 Difference]: Finished difference Result 2555 states and 3358 transitions. [2022-10-17 10:31:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-10-17 10:31:06,557 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 [2022-10-17 10:31:06,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:06,570 INFO L225 Difference]: With dead ends: 2555 [2022-10-17 10:31:06,570 INFO L226 Difference]: Without dead ends: 2011 [2022-10-17 10:31:06,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-10-17 10:31:06,574 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 780 mSDsluCounter, 2034 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 2495 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:06,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 2495 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 10:31:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-10-17 10:31:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1244. [2022-10-17 10:31:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1099 states have (on average 1.2911737943585078) internal successors, (1419), 1118 states have internal predecessors, (1419), 84 states have call successors, (84), 50 states have call predecessors, (84), 59 states have return successors, (123), 76 states have call predecessors, (123), 81 states have call successors, (123) [2022-10-17 10:31:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1626 transitions. [2022-10-17 10:31:06,736 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1626 transitions. Word has length 69 [2022-10-17 10:31:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:06,736 INFO L495 AbstractCegarLoop]: Abstraction has 1244 states and 1626 transitions. [2022-10-17 10:31:06,736 INFO L496 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) [2022-10-17 10:31:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1626 transitions. [2022-10-17 10:31:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:31:06,741 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:06,741 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:06,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:06,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 10:31:06,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:06,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:06,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1086322536, now seen corresponding path program 1 times [2022-10-17 10:31:06,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:06,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312412972] [2022-10-17 10:31:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:06,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:07,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:07,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:31:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:07,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:07,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:07,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:31:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:07,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:07,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312412972] [2022-10-17 10:31:07,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312412972] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:07,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:07,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:31:07,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119889420] [2022-10-17 10:31:07,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:07,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:31:07,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:07,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:31:07,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:31:07,083 INFO L87 Difference]: Start difference. First operand 1244 states and 1626 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:08,408 INFO L93 Difference]: Finished difference Result 1626 states and 2217 transitions. [2022-10-17 10:31:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:31:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-10-17 10:31:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:08,419 INFO L225 Difference]: With dead ends: 1626 [2022-10-17 10:31:08,419 INFO L226 Difference]: Without dead ends: 1478 [2022-10-17 10:31:08,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:31:08,422 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 679 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:08,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 934 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 10:31:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2022-10-17 10:31:08,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1391. [2022-10-17 10:31:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1227 states have (on average 1.317033414832926) internal successors, (1616), 1247 states have internal predecessors, (1616), 96 states have call successors, (96), 56 states have call predecessors, (96), 66 states have return successors, (138), 88 states have call predecessors, (138), 93 states have call successors, (138) [2022-10-17 10:31:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 1850 transitions. [2022-10-17 10:31:08,632 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 1850 transitions. Word has length 80 [2022-10-17 10:31:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:08,633 INFO L495 AbstractCegarLoop]: Abstraction has 1391 states and 1850 transitions. [2022-10-17 10:31:08,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 1850 transitions. [2022-10-17 10:31:08,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:31:08,637 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:08,638 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:08,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:31:08,638 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:08,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1967204244, now seen corresponding path program 1 times [2022-10-17 10:31:08,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:08,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470308128] [2022-10-17 10:31:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:08,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:08,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:08,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:31:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:08,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:08,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:08,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:31:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:08,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:08,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470308128] [2022-10-17 10:31:08,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470308128] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:08,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:08,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:31:08,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120373890] [2022-10-17 10:31:08,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:08,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:08,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:08,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:31:08,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:08,834 INFO L87 Difference]: Start difference. First operand 1391 states and 1850 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:10,566 INFO L93 Difference]: Finished difference Result 1964 states and 2730 transitions. [2022-10-17 10:31:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:31:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-10-17 10:31:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:10,580 INFO L225 Difference]: With dead ends: 1964 [2022-10-17 10:31:10,580 INFO L226 Difference]: Without dead ends: 1669 [2022-10-17 10:31:10,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:31:10,585 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 670 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:10,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 1491 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-17 10:31:10,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2022-10-17 10:31:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1529. [2022-10-17 10:31:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1346 states have (on average 1.3335809806835066) internal successors, (1795), 1367 states have internal predecessors, (1795), 108 states have call successors, (108), 62 states have call predecessors, (108), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-10-17 10:31:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2055 transitions. [2022-10-17 10:31:10,791 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2055 transitions. Word has length 80 [2022-10-17 10:31:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:10,791 INFO L495 AbstractCegarLoop]: Abstraction has 1529 states and 2055 transitions. [2022-10-17 10:31:10,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2055 transitions. [2022-10-17 10:31:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:31:10,796 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:10,797 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:10,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:31:10,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:10,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:10,798 INFO L85 PathProgramCache]: Analyzing trace with hash 281024406, now seen corresponding path program 1 times [2022-10-17 10:31:10,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:10,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745795720] [2022-10-17 10:31:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:10,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:10,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:10,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:31:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:10,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:10,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:10,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:31:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:10,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:10,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745795720] [2022-10-17 10:31:10,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745795720] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:10,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:10,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:31:10,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446701197] [2022-10-17 10:31:10,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:10,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:10,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:31:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:10,956 INFO L87 Difference]: Start difference. First operand 1529 states and 2055 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:12,514 INFO L93 Difference]: Finished difference Result 2461 states and 3483 transitions. [2022-10-17 10:31:12,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:31:12,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-10-17 10:31:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:12,530 INFO L225 Difference]: With dead ends: 2461 [2022-10-17 10:31:12,531 INFO L226 Difference]: Without dead ends: 2028 [2022-10-17 10:31:12,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:31:12,535 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 667 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:12,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 1483 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 10:31:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2022-10-17 10:31:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1806. [2022-10-17 10:31:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1585 states have (on average 1.3589905362776025) internal successors, (2154), 1608 states have internal predecessors, (2154), 132 states have call successors, (132), 74 states have call predecessors, (132), 87 states have return successors, (184), 127 states have call predecessors, (184), 129 states have call successors, (184) [2022-10-17 10:31:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2470 transitions. [2022-10-17 10:31:12,808 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2470 transitions. Word has length 80 [2022-10-17 10:31:12,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:12,808 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2470 transitions. [2022-10-17 10:31:12,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2470 transitions. [2022-10-17 10:31:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:31:12,817 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:12,817 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:12,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:31:12,818 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:12,819 INFO L85 PathProgramCache]: Analyzing trace with hash 226631508, now seen corresponding path program 1 times [2022-10-17 10:31:12,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:12,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039550847] [2022-10-17 10:31:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:12,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:12,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:12,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:31:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:12,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:12,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:12,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:31:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:12,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:12,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039550847] [2022-10-17 10:31:12,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039550847] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:12,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:12,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:31:12,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496479803] [2022-10-17 10:31:12,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:12,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:12,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:12,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:31:12,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:12,975 INFO L87 Difference]: Start difference. First operand 1806 states and 2470 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:14,014 INFO L93 Difference]: Finished difference Result 2726 states and 3889 transitions. [2022-10-17 10:31:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:31:14,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-10-17 10:31:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:14,029 INFO L225 Difference]: With dead ends: 2726 [2022-10-17 10:31:14,029 INFO L226 Difference]: Without dead ends: 2016 [2022-10-17 10:31:14,033 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:31:14,034 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 540 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:14,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 919 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:31:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2022-10-17 10:31:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1806. [2022-10-17 10:31:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1585 states have (on average 1.3558359621451104) internal successors, (2149), 1608 states have internal predecessors, (2149), 132 states have call successors, (132), 74 states have call predecessors, (132), 87 states have return successors, (184), 127 states have call predecessors, (184), 129 states have call successors, (184) [2022-10-17 10:31:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2465 transitions. [2022-10-17 10:31:14,338 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2465 transitions. Word has length 80 [2022-10-17 10:31:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:14,338 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2465 transitions. [2022-10-17 10:31:14,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2465 transitions. [2022-10-17 10:31:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:31:14,344 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:14,344 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:14,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:31:14,345 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:14,345 INFO L85 PathProgramCache]: Analyzing trace with hash -190765098, now seen corresponding path program 1 times [2022-10-17 10:31:14,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:14,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106141389] [2022-10-17 10:31:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:14,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:14,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:14,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:31:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:14,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:14,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:14,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:31:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:14,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106141389] [2022-10-17 10:31:14,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106141389] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:14,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:14,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:31:14,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910633898] [2022-10-17 10:31:14,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:14,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:14,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:14,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:31:14,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:14,482 INFO L87 Difference]: Start difference. First operand 1806 states and 2465 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:15,459 INFO L93 Difference]: Finished difference Result 2720 states and 3863 transitions. [2022-10-17 10:31:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:31:15,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-10-17 10:31:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:15,472 INFO L225 Difference]: With dead ends: 2720 [2022-10-17 10:31:15,473 INFO L226 Difference]: Without dead ends: 2010 [2022-10-17 10:31:15,476 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:31:15,477 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 552 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:15,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 903 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:31:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-10-17 10:31:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1806. [2022-10-17 10:31:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1585 states have (on average 1.3526813880126183) internal successors, (2144), 1608 states have internal predecessors, (2144), 132 states have call successors, (132), 74 states have call predecessors, (132), 87 states have return successors, (184), 127 states have call predecessors, (184), 129 states have call successors, (184) [2022-10-17 10:31:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2460 transitions. [2022-10-17 10:31:15,770 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2460 transitions. Word has length 80 [2022-10-17 10:31:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:15,770 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2460 transitions. [2022-10-17 10:31:15,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:15,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2460 transitions. [2022-10-17 10:31:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:31:15,775 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:15,776 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:15,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:31:15,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash 488507156, now seen corresponding path program 1 times [2022-10-17 10:31:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:15,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682877233] [2022-10-17 10:31:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:15,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:15,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:31:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:15,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:15,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:15,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:31:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:15,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:15,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682877233] [2022-10-17 10:31:15,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682877233] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:15,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:15,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:31:15,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78422442] [2022-10-17 10:31:15,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:15,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:15,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:31:15,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:15,966 INFO L87 Difference]: Start difference. First operand 1806 states and 2460 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:17,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:17,582 INFO L93 Difference]: Finished difference Result 3507 states and 5012 transitions. [2022-10-17 10:31:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:31:17,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-10-17 10:31:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:17,604 INFO L225 Difference]: With dead ends: 3507 [2022-10-17 10:31:17,604 INFO L226 Difference]: Without dead ends: 2797 [2022-10-17 10:31:17,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:31:17,609 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 706 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:17,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1451 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 10:31:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-10-17 10:31:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2362. [2022-10-17 10:31:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2069 states have (on average 1.3852102464958918) internal successors, (2866), 2096 states have internal predecessors, (2866), 176 states have call successors, (176), 98 states have call predecessors, (176), 115 states have return successors, (250), 175 states have call predecessors, (250), 173 states have call successors, (250) [2022-10-17 10:31:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3292 transitions. [2022-10-17 10:31:18,023 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3292 transitions. Word has length 80 [2022-10-17 10:31:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:18,023 INFO L495 AbstractCegarLoop]: Abstraction has 2362 states and 3292 transitions. [2022-10-17 10:31:18,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3292 transitions. [2022-10-17 10:31:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:31:18,030 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:18,030 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:18,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 10:31:18,031 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:18,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:18,031 INFO L85 PathProgramCache]: Analyzing trace with hash 690331090, now seen corresponding path program 1 times [2022-10-17 10:31:18,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:18,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479360197] [2022-10-17 10:31:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:18,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:18,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:18,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:31:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:18,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:18,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:18,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:31:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:18,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:18,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479360197] [2022-10-17 10:31:18,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479360197] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:18,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:18,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:31:18,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034468665] [2022-10-17 10:31:18,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:18,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:18,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:18,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:31:18,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:18,191 INFO L87 Difference]: Start difference. First operand 2362 states and 3292 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:20,029 INFO L93 Difference]: Finished difference Result 5385 states and 7826 transitions. [2022-10-17 10:31:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:31:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-10-17 10:31:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:20,073 INFO L225 Difference]: With dead ends: 5385 [2022-10-17 10:31:20,073 INFO L226 Difference]: Without dead ends: 4119 [2022-10-17 10:31:20,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:31:20,080 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 651 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:20,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 1459 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 10:31:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2022-10-17 10:31:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3463. [2022-10-17 10:31:20,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3030 states have (on average 1.4191419141914192) internal successors, (4300), 3065 states have internal predecessors, (4300), 260 states have call successors, (260), 146 states have call predecessors, (260), 171 states have return successors, (396), 267 states have call predecessors, (396), 257 states have call successors, (396) [2022-10-17 10:31:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 4956 transitions. [2022-10-17 10:31:20,694 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 4956 transitions. Word has length 80 [2022-10-17 10:31:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:20,694 INFO L495 AbstractCegarLoop]: Abstraction has 3463 states and 4956 transitions. [2022-10-17 10:31:20,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 4956 transitions. [2022-10-17 10:31:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:31:20,702 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:20,702 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:20,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 10:31:20,703 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:20,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1251030868, now seen corresponding path program 1 times [2022-10-17 10:31:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031305169] [2022-10-17 10:31:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:20,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:20,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:31:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:20,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:31:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:20,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:20,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:20,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:31:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:20,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:20,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031305169] [2022-10-17 10:31:20,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031305169] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:20,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:20,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:31:20,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415436556] [2022-10-17 10:31:20,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:20,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:31:20,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:20,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:31:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:31:20,844 INFO L87 Difference]: Start difference. First operand 3463 states and 4956 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:22,887 INFO L93 Difference]: Finished difference Result 9041 states and 13314 transitions. [2022-10-17 10:31:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:31:22,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-10-17 10:31:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:22,936 INFO L225 Difference]: With dead ends: 9041 [2022-10-17 10:31:22,936 INFO L226 Difference]: Without dead ends: 6675 [2022-10-17 10:31:22,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:31:22,947 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 823 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:22,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 1169 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 10:31:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2022-10-17 10:31:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 5654. [2022-10-17 10:31:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 4914 states have (on average 1.426943426943427) internal successors, (7012), 4982 states have internal predecessors, (7012), 449 states have call successors, (449), 248 states have call predecessors, (449), 289 states have return successors, (667), 439 states have call predecessors, (667), 446 states have call successors, (667) [2022-10-17 10:31:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 8128 transitions. [2022-10-17 10:31:23,918 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 8128 transitions. Word has length 80 [2022-10-17 10:31:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:23,919 INFO L495 AbstractCegarLoop]: Abstraction has 5654 states and 8128 transitions. [2022-10-17 10:31:23,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:31:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 8128 transitions. [2022-10-17 10:31:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-10-17 10:31:23,930 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:23,930 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:31:23,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 10:31:23,933 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2050145287, now seen corresponding path program 1 times [2022-10-17 10:31:23,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:23,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581536607] [2022-10-17 10:31:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:24,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:31:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:24,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:24,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-17 10:31:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:24,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-10-17 10:31:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-10-17 10:31:24,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:24,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581536607] [2022-10-17 10:31:24,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581536607] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:24,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039533706] [2022-10-17 10:31:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:24,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:24,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:24,072 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:24,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbc4783e-ac8b-4be9-a953-d8a1fe31c439/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:31:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:24,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:31:24,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:31:24,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:24,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039533706] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:24,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:24,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 10:31:24,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201177630] [2022-10-17 10:31:24,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:24,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:31:24,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:31:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:24,231 INFO L87 Difference]: Start difference. First operand 5654 states and 8128 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)