./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8 --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 a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb --- 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-e04fb08 [2022-11-16 12:29:50,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:29:50,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:29:50,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:29:50,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:29:50,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:29:50,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:29:50,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:29:50,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:29:50,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:29:50,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:29:50,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:29:50,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:29:50,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:29:50,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:29:50,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:29:50,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:29:50,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:29:50,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:29:50,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:29:50,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:29:50,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:29:50,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:29:50,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:29:50,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:29:50,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:29:50,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:29:50,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:29:50,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:29:50,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:29:50,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:29:50,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:29:50,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:29:50,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:29:50,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:29:50,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:29:50,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:29:50,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:29:50,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:29:50,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:29:50,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:29:50,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:29:50,435 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:29:50,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:29:50,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:29:50,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:29:50,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:29:50,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:29:50,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:29:50,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:29:50,438 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:29:50,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:29:50,439 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:29:50,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:29:50,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:29:50,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:29:50,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:29:50,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:29:50,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:29:50,441 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:29:50,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:29:50,441 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:29:50,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:29:50,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:29:50,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:29:50,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:29:50,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:29:50,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:29:50,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:29:50,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:29:50,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:29:50,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:29:50,445 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:29:50,445 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:29:50,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:29:50,446 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_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb [2022-11-16 12:29:50,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:29:50,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:29:50,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:29:50,818 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:29:50,818 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:29:50,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2022-11-16 12:29:50,891 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/data/5ef08b3d7/70a3de721b624522ad4282b28b65f9af/FLAG8c3af4a8c [2022-11-16 12:29:51,430 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:29:51,431 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2022-11-16 12:29:51,449 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/data/5ef08b3d7/70a3de721b624522ad4282b28b65f9af/FLAG8c3af4a8c [2022-11-16 12:29:51,862 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/data/5ef08b3d7/70a3de721b624522ad4282b28b65f9af [2022-11-16 12:29:51,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:29:51,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:29:51,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:29:51,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:29:51,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:29:51,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:29:51" (1/1) ... [2022-11-16 12:29:51,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28d4ac6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:51, skipping insertion in model container [2022-11-16 12:29:51,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:29:51" (1/1) ... [2022-11-16 12:29:51,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:29:51,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:29:52,103 WARN L229 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_163ca222-ba62-4504-9221-1bcccc4fe666/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[913,926] [2022-11-16 12:29:52,143 WARN L229 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_163ca222-ba62-4504-9221-1bcccc4fe666/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[5977,5990] [2022-11-16 12:29:52,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:29:52,189 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:29:52,200 WARN L229 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_163ca222-ba62-4504-9221-1bcccc4fe666/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[913,926] [2022-11-16 12:29:52,224 WARN L229 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_163ca222-ba62-4504-9221-1bcccc4fe666/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[5977,5990] [2022-11-16 12:29:52,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:29:52,301 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:29:52,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52 WrapperNode [2022-11-16 12:29:52,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:29:52,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:29:52,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:29:52,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:29:52,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,383 INFO L138 Inliner]: procedures = 52, calls = 55, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 480 [2022-11-16 12:29:52,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:29:52,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:29:52,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:29:52,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:29:52,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,447 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:29:52,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:29:52,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:29:52,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:29:52,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (1/1) ... [2022-11-16 12:29:52,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:29:52,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:52,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:29:52,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:29:52,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:29:52,550 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 12:29:52,551 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 12:29:52,551 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-16 12:29:52,553 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-16 12:29:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-16 12:29:52,553 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-16 12:29:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-16 12:29:52,554 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-16 12:29:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-16 12:29:52,555 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-16 12:29:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-16 12:29:52,555 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-16 12:29:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-16 12:29:52,555 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-16 12:29:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:29:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-16 12:29:52,556 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-16 12:29:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:29:52,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:29:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-16 12:29:52,557 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-16 12:29:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-16 12:29:52,557 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-16 12:29:52,709 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:29:52,712 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:29:53,214 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:29:53,222 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:29:53,222 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-16 12:29:53,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:29:53 BoogieIcfgContainer [2022-11-16 12:29:53,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:29:53,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:29:53,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:29:53,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:29:53,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:29:51" (1/3) ... [2022-11-16 12:29:53,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be0d543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:29:53, skipping insertion in model container [2022-11-16 12:29:53,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:52" (2/3) ... [2022-11-16 12:29:53,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be0d543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:29:53, skipping insertion in model container [2022-11-16 12:29:53,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:29:53" (3/3) ... [2022-11-16 12:29:53,233 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2022-11-16 12:29:53,252 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:29:53,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 12:29:53,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:29:53,340 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;@246a674c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:29:53,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:29:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 175 states have (on average 1.5771428571428572) internal successors, (276), 182 states have internal predecessors, (276), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-16 12:29:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 12:29:53,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:53,357 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] [2022-11-16 12:29:53,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:29:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:53,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2045589042, now seen corresponding path program 1 times [2022-11-16 12:29:53,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:53,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705435888] [2022-11-16 12:29:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:53,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:53,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:29:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:53,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:29:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:53,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:53,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705435888] [2022-11-16 12:29:53,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705435888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:53,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:53,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:29:53,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041684400] [2022-11-16 12:29:53,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:53,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:29:53,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:29:53,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:29:53,774 INFO L87 Difference]: Start difference. First operand has 212 states, 175 states have (on average 1.5771428571428572) internal successors, (276), 182 states have internal predecessors, (276), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) 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) [2022-11-16 12:29:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:54,329 INFO L93 Difference]: Finished difference Result 478 states and 736 transitions. [2022-11-16 12:29:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:29:54,333 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 [2022-11-16 12:29:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:54,355 INFO L225 Difference]: With dead ends: 478 [2022-11-16 12:29:54,355 INFO L226 Difference]: Without dead ends: 271 [2022-11-16 12:29:54,359 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 [2022-11-16 12:29:54,363 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 357 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:54,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 477 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:29:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-16 12:29:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 265. [2022-11-16 12:29:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 224 states have (on average 1.4419642857142858) internal successors, (323), 229 states have internal predecessors, (323), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (30), 24 states have call predecessors, (30), 24 states have call successors, (30) [2022-11-16 12:29:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 381 transitions. [2022-11-16 12:29:54,468 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 381 transitions. Word has length 44 [2022-11-16 12:29:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:54,469 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 381 transitions. [2022-11-16 12:29:54,469 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) [2022-11-16 12:29:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 381 transitions. [2022-11-16 12:29:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:29:54,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:54,473 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] [2022-11-16 12:29:54,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:29:54,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:29:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash 899257869, now seen corresponding path program 1 times [2022-11-16 12:29:54,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:54,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712540039] [2022-11-16 12:29:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:54,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:54,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:29:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:54,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:29:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:54,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:54,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712540039] [2022-11-16 12:29:54,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712540039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:54,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:54,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:29:54,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873082183] [2022-11-16 12:29:54,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:54,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:29:54,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:29:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:29:54,585 INFO L87 Difference]: Start difference. First operand 265 states and 381 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) [2022-11-16 12:29:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:54,941 INFO L93 Difference]: Finished difference Result 513 states and 721 transitions. [2022-11-16 12:29:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:29:54,942 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 [2022-11-16 12:29:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:54,953 INFO L225 Difference]: With dead ends: 513 [2022-11-16 12:29:54,953 INFO L226 Difference]: Without dead ends: 389 [2022-11-16 12:29:54,955 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 [2022-11-16 12:29:54,956 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 170 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:54,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 606 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:29:54,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-11-16 12:29:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 332. [2022-11-16 12:29:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 285 states have (on average 1.4280701754385965) internal successors, (407), 290 states have internal predecessors, (407), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2022-11-16 12:29:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 471 transitions. [2022-11-16 12:29:55,025 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 471 transitions. Word has length 45 [2022-11-16 12:29:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:55,026 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 471 transitions. [2022-11-16 12:29:55,026 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) [2022-11-16 12:29:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 471 transitions. [2022-11-16 12:29:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:29:55,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:55,031 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] [2022-11-16 12:29:55,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:29:55,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:29:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash -385099592, now seen corresponding path program 1 times [2022-11-16 12:29:55,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:55,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247623816] [2022-11-16 12:29:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:55,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:55,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:29:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:55,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:29:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:55,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:55,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247623816] [2022-11-16 12:29:55,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247623816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:55,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:55,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:29:55,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468917439] [2022-11-16 12:29:55,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:55,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:29:55,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:29:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:29:55,251 INFO L87 Difference]: Start difference. First operand 332 states and 471 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) [2022-11-16 12:29:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:55,588 INFO L93 Difference]: Finished difference Result 740 states and 1030 transitions. [2022-11-16 12:29:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:29:55,589 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 [2022-11-16 12:29:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:55,595 INFO L225 Difference]: With dead ends: 740 [2022-11-16 12:29:55,595 INFO L226 Difference]: Without dead ends: 549 [2022-11-16 12:29:55,598 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 [2022-11-16 12:29:55,605 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 366 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:55,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 468 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:29:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-11-16 12:29:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 497. [2022-11-16 12:29:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 431 states have (on average 1.3851508120649652) internal successors, (597), 439 states have internal predecessors, (597), 42 states have call successors, (42), 22 states have call predecessors, (42), 22 states have return successors, (50), 36 states have call predecessors, (50), 38 states have call successors, (50) [2022-11-16 12:29:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 689 transitions. [2022-11-16 12:29:55,674 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 689 transitions. Word has length 45 [2022-11-16 12:29:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:55,674 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 689 transitions. [2022-11-16 12:29:55,675 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) [2022-11-16 12:29:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 689 transitions. [2022-11-16 12:29:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:29:55,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:55,683 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] [2022-11-16 12:29:55,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:29:55,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:29:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:55,685 INFO L85 PathProgramCache]: Analyzing trace with hash -748902494, now seen corresponding path program 1 times [2022-11-16 12:29:55,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:55,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836459379] [2022-11-16 12:29:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:55,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:55,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:29:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:55,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-16 12:29:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:55,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 12:29:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:29:55,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836459379] [2022-11-16 12:29:55,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836459379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:55,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:55,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:29:55,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130860538] [2022-11-16 12:29:55,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:55,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:29:55,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:29:55,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:29:55,833 INFO L87 Difference]: Start difference. First operand 497 states and 689 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) [2022-11-16 12:29:56,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:56,189 INFO L93 Difference]: Finished difference Result 1081 states and 1474 transitions. [2022-11-16 12:29:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:29:56,190 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 [2022-11-16 12:29:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:56,194 INFO L225 Difference]: With dead ends: 1081 [2022-11-16 12:29:56,194 INFO L226 Difference]: Without dead ends: 725 [2022-11-16 12:29:56,195 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 [2022-11-16 12:29:56,196 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 154 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:56,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 658 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:29:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-11-16 12:29:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 687. [2022-11-16 12:29:56,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 597 states have (on average 1.3350083752093802) internal successors, (797), 607 states have internal predecessors, (797), 56 states have call successors, (56), 30 states have call predecessors, (56), 32 states have return successors, (74), 50 states have call predecessors, (74), 52 states have call successors, (74) [2022-11-16 12:29:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 927 transitions. [2022-11-16 12:29:56,256 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 927 transitions. Word has length 62 [2022-11-16 12:29:56,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:56,258 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 927 transitions. [2022-11-16 12:29:56,259 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) [2022-11-16 12:29:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 927 transitions. [2022-11-16 12:29:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:29:56,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:56,264 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] [2022-11-16 12:29:56,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:29:56,267 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:29:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:56,268 INFO L85 PathProgramCache]: Analyzing trace with hash -80982464, now seen corresponding path program 1 times [2022-11-16 12:29:56,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:56,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896570674] [2022-11-16 12:29:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:56,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:56,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:29:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:56,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:29:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:56,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 12:29:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:29:56,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:56,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896570674] [2022-11-16 12:29:56,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896570674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:56,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:56,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:29:56,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118875225] [2022-11-16 12:29:56,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:56,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:29:56,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:56,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:29:56,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:29:56,403 INFO L87 Difference]: Start difference. First operand 687 states and 927 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) [2022-11-16 12:29:56,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:56,715 INFO L93 Difference]: Finished difference Result 1340 states and 1780 transitions. [2022-11-16 12:29:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:29:56,716 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 [2022-11-16 12:29:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:56,722 INFO L225 Difference]: With dead ends: 1340 [2022-11-16 12:29:56,722 INFO L226 Difference]: Without dead ends: 886 [2022-11-16 12:29:56,724 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 [2022-11-16 12:29:56,727 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 353 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:56,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 466 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:29:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-11-16 12:29:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 831. [2022-11-16 12:29:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 725 states have (on average 1.3075862068965518) internal successors, (948), 737 states have internal predecessors, (948), 64 states have call successors, (64), 36 states have call predecessors, (64), 40 states have return successors, (88), 58 states have call predecessors, (88), 60 states have call successors, (88) [2022-11-16 12:29:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1100 transitions. [2022-11-16 12:29:56,812 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1100 transitions. Word has length 67 [2022-11-16 12:29:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:56,812 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1100 transitions. [2022-11-16 12:29:56,813 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) [2022-11-16 12:29:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1100 transitions. [2022-11-16 12:29:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:29:56,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:56,816 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] [2022-11-16 12:29:56,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:29:56,819 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:29:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash -294715005, now seen corresponding path program 1 times [2022-11-16 12:29:56,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:56,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199289260] [2022-11-16 12:29:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:56,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:56,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:29:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:56,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:29:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:57,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:29:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:57,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:29:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:57,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:29:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:57,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:57,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199289260] [2022-11-16 12:29:57,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199289260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:57,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:57,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:29:57,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13810607] [2022-11-16 12:29:57,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:57,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:29:57,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:57,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:29:57,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:29:57,037 INFO L87 Difference]: Start difference. First operand 831 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-11-16 12:29:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:58,109 INFO L93 Difference]: Finished difference Result 1141 states and 1571 transitions. [2022-11-16 12:29:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:29:58,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 69 [2022-11-16 12:29:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:58,115 INFO L225 Difference]: With dead ends: 1141 [2022-11-16 12:29:58,115 INFO L226 Difference]: Without dead ends: 1017 [2022-11-16 12:29:58,116 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 [2022-11-16 12:29:58,117 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 574 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:58,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 716 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:29:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-11-16 12:29:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 952. [2022-11-16 12:29:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 828 states have (on average 1.3333333333333333) internal successors, (1104), 841 states have internal predecessors, (1104), 75 states have call successors, (75), 42 states have call predecessors, (75), 47 states have return successors, (102), 69 states have call predecessors, (102), 71 states have call successors, (102) [2022-11-16 12:29:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1281 transitions. [2022-11-16 12:29:58,249 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1281 transitions. Word has length 69 [2022-11-16 12:29:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:58,250 INFO L495 AbstractCegarLoop]: Abstraction has 952 states and 1281 transitions. [2022-11-16 12:29:58,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-11-16 12:29:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1281 transitions. [2022-11-16 12:29:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:29:58,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:58,253 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] [2022-11-16 12:29:58,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:29:58,253 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:29:58,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash -192000641, now seen corresponding path program 1 times [2022-11-16 12:29:58,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:58,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376182997] [2022-11-16 12:29:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:58,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:58,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:29:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:58,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:29:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:58,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:29:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:58,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:29:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:58,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:29:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:58,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:58,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376182997] [2022-11-16 12:29:58,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376182997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:58,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:58,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:29:58,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160775684] [2022-11-16 12:29:58,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:58,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:29:58,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:58,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:29:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:29:58,464 INFO L87 Difference]: Start difference. First operand 952 states and 1281 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-16 12:29:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:59,788 INFO L93 Difference]: Finished difference Result 1414 states and 1975 transitions. [2022-11-16 12:29:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:29:59,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2022-11-16 12:29:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:59,794 INFO L225 Difference]: With dead ends: 1414 [2022-11-16 12:29:59,794 INFO L226 Difference]: Without dead ends: 1169 [2022-11-16 12:29:59,796 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 [2022-11-16 12:29:59,796 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 567 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:59,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1168 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:29:59,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-11-16 12:29:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1066. [2022-11-16 12:29:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 924 states have (on average 1.3484848484848484) internal successors, (1246), 938 states have internal predecessors, (1246), 86 states have call successors, (86), 48 states have call predecessors, (86), 54 states have return successors, (115), 81 states have call predecessors, (115), 82 states have call successors, (115) [2022-11-16 12:29:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1447 transitions. [2022-11-16 12:29:59,892 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1447 transitions. Word has length 69 [2022-11-16 12:29:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:59,892 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1447 transitions. [2022-11-16 12:29:59,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-16 12:29:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1447 transitions. [2022-11-16 12:29:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:29:59,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:59,896 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] [2022-11-16 12:29:59,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:29:59,896 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:29:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:59,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1194784769, now seen corresponding path program 1 times [2022-11-16 12:29:59,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:59,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797731777] [2022-11-16 12:29:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:59,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:59,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:29:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:59,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:29:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:00,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:00,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:00,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:00,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:00,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797731777] [2022-11-16 12:30:00,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797731777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:00,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:00,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:30:00,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741182760] [2022-11-16 12:30:00,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:00,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:30:00,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:00,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:30:00,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:00,063 INFO L87 Difference]: Start difference. First operand 1066 states and 1447 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-16 12:30:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:01,262 INFO L93 Difference]: Finished difference Result 1815 states and 2569 transitions. [2022-11-16 12:30:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:30:01,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2022-11-16 12:30:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:01,269 INFO L225 Difference]: With dead ends: 1815 [2022-11-16 12:30:01,269 INFO L226 Difference]: Without dead ends: 1456 [2022-11-16 12:30:01,271 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 [2022-11-16 12:30:01,272 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 601 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:01,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 885 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:30:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2022-11-16 12:30:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1295. [2022-11-16 12:30:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1117 states have (on average 1.370635631154879) internal successors, (1531), 1133 states have internal predecessors, (1531), 108 states have call successors, (108), 60 states have call predecessors, (108), 68 states have return successors, (145), 105 states have call predecessors, (145), 104 states have call successors, (145) [2022-11-16 12:30:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1784 transitions. [2022-11-16 12:30:01,413 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1784 transitions. Word has length 69 [2022-11-16 12:30:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:01,415 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1784 transitions. [2022-11-16 12:30:01,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-16 12:30:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1784 transitions. [2022-11-16 12:30:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:30:01,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:01,424 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] [2022-11-16 12:30:01,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:30:01,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2070803775, now seen corresponding path program 1 times [2022-11-16 12:30:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:01,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507408423] [2022-11-16 12:30:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:01,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:01,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:01,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:01,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:01,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:01,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:01,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:01,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507408423] [2022-11-16 12:30:01,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507408423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:01,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:01,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:30:01,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24501624] [2022-11-16 12:30:01,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:01,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:30:01,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:01,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:30:01,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:01,597 INFO L87 Difference]: Start difference. First operand 1295 states and 1784 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-16 12:30:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:02,364 INFO L93 Difference]: Finished difference Result 2032 states and 2897 transitions. [2022-11-16 12:30:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:30:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2022-11-16 12:30:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:02,371 INFO L225 Difference]: With dead ends: 2032 [2022-11-16 12:30:02,372 INFO L226 Difference]: Without dead ends: 1444 [2022-11-16 12:30:02,374 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 [2022-11-16 12:30:02,374 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 474 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:02,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 714 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:30:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-11-16 12:30:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1295. [2022-11-16 12:30:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1117 states have (on average 1.3661593554162936) internal successors, (1526), 1133 states have internal predecessors, (1526), 108 states have call successors, (108), 60 states have call predecessors, (108), 68 states have return successors, (145), 105 states have call predecessors, (145), 104 states have call successors, (145) [2022-11-16 12:30:02,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1779 transitions. [2022-11-16 12:30:02,544 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1779 transitions. Word has length 69 [2022-11-16 12:30:02,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:02,544 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1779 transitions. [2022-11-16 12:30:02,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-16 12:30:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1779 transitions. [2022-11-16 12:30:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:30:02,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:02,548 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] [2022-11-16 12:30:02,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:30:02,548 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1780262847, now seen corresponding path program 1 times [2022-11-16 12:30:02,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:02,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99539613] [2022-11-16 12:30:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:02,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:02,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:02,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:02,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:02,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:02,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:02,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99539613] [2022-11-16 12:30:02,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99539613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:02,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:02,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:30:02,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816902838] [2022-11-16 12:30:02,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:02,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:30:02,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:02,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:30:02,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:02,695 INFO L87 Difference]: Start difference. First operand 1295 states and 1779 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-16 12:30:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:04,117 INFO L93 Difference]: Finished difference Result 2685 states and 3828 transitions. [2022-11-16 12:30:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:30:04,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2022-11-16 12:30:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:04,127 INFO L225 Difference]: With dead ends: 2685 [2022-11-16 12:30:04,127 INFO L226 Difference]: Without dead ends: 2097 [2022-11-16 12:30:04,131 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 [2022-11-16 12:30:04,132 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 563 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:04,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 1152 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:30:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2022-11-16 12:30:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1706. [2022-11-16 12:30:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1460 states have (on average 1.3815068493150684) internal successors, (2017), 1480 states have internal predecessors, (2017), 148 states have call successors, (148), 84 states have call predecessors, (148), 96 states have return successors, (207), 149 states have call predecessors, (207), 144 states have call successors, (207) [2022-11-16 12:30:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2372 transitions. [2022-11-16 12:30:04,320 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2372 transitions. Word has length 69 [2022-11-16 12:30:04,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:04,321 INFO L495 AbstractCegarLoop]: Abstraction has 1706 states and 2372 transitions. [2022-11-16 12:30:04,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-16 12:30:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2372 transitions. [2022-11-16 12:30:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:30:04,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:04,325 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] [2022-11-16 12:30:04,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:30:04,326 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:04,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:04,328 INFO L85 PathProgramCache]: Analyzing trace with hash -241922817, now seen corresponding path program 1 times [2022-11-16 12:30:04,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:04,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923917747] [2022-11-16 12:30:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:04,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:04,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:04,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:04,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:04,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:04,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:04,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:04,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923917747] [2022-11-16 12:30:04,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923917747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:04,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:04,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:30:04,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448607531] [2022-11-16 12:30:04,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:04,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:30:04,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:04,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:30:04,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:04,494 INFO L87 Difference]: Start difference. First operand 1706 states and 2372 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-16 12:30:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:05,843 INFO L93 Difference]: Finished difference Result 4076 states and 5836 transitions. [2022-11-16 12:30:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:30:05,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2022-11-16 12:30:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:05,864 INFO L225 Difference]: With dead ends: 4076 [2022-11-16 12:30:05,864 INFO L226 Difference]: Without dead ends: 3077 [2022-11-16 12:30:05,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:30:05,869 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 564 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:05,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1156 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:30:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2022-11-16 12:30:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2560. [2022-11-16 12:30:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2182 states have (on average 1.4055912007332723) internal successors, (3067), 2210 states have internal predecessors, (3067), 224 states have call successors, (224), 132 states have call predecessors, (224), 152 states have return successors, (345), 233 states have call predecessors, (345), 220 states have call successors, (345) [2022-11-16 12:30:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3636 transitions. [2022-11-16 12:30:06,186 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3636 transitions. Word has length 69 [2022-11-16 12:30:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:06,186 INFO L495 AbstractCegarLoop]: Abstraction has 2560 states and 3636 transitions. [2022-11-16 12:30:06,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-16 12:30:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3636 transitions. [2022-11-16 12:30:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:30:06,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:06,190 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] [2022-11-16 12:30:06,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:30:06,191 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:06,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2024458369, now seen corresponding path program 1 times [2022-11-16 12:30:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:06,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654860935] [2022-11-16 12:30:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:06,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:06,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:06,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:06,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:06,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:06,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:06,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:06,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654860935] [2022-11-16 12:30:06,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654860935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:06,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:06,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:30:06,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540807016] [2022-11-16 12:30:06,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:06,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:30:06,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:30:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:30:06,300 INFO L87 Difference]: Start difference. First operand 2560 states and 3636 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-11-16 12:30:07,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:07,727 INFO L93 Difference]: Finished difference Result 5934 states and 8606 transitions. [2022-11-16 12:30:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:30:07,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 69 [2022-11-16 12:30:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:07,749 INFO L225 Difference]: With dead ends: 5934 [2022-11-16 12:30:07,749 INFO L226 Difference]: Without dead ends: 4082 [2022-11-16 12:30:07,756 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 [2022-11-16 12:30:07,757 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 700 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:07,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 846 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:30:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2022-11-16 12:30:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3500. [2022-11-16 12:30:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 2964 states have (on average 1.4021592442645074) internal successors, (4156), 3009 states have internal predecessors, (4156), 320 states have call successors, (320), 186 states have call predecessors, (320), 214 states have return successors, (469), 320 states have call predecessors, (469), 316 states have call successors, (469) [2022-11-16 12:30:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 4945 transitions. [2022-11-16 12:30:08,161 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 4945 transitions. Word has length 69 [2022-11-16 12:30:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:08,161 INFO L495 AbstractCegarLoop]: Abstraction has 3500 states and 4945 transitions. [2022-11-16 12:30:08,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-11-16 12:30:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 4945 transitions. [2022-11-16 12:30:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:30:08,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:08,165 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:08,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:30:08,166 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:08,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash 688510564, now seen corresponding path program 1 times [2022-11-16 12:30:08,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:08,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198798649] [2022-11-16 12:30:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:08,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:08,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:30:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:08,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:30:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:08,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 12:30:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:30:08,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:08,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198798649] [2022-11-16 12:30:08,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198798649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412184807] [2022-11-16 12:30:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:08,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:08,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:08,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:08,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:30:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:08,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:30:08,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:30:08,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:08,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412184807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:08,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:08,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 12:30:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540747620] [2022-11-16 12:30:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:08,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:08,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:08,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:08,473 INFO L87 Difference]: Start difference. First operand 3500 states and 4945 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:30:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:08,955 INFO L93 Difference]: Finished difference Result 4043 states and 5668 transitions. [2022-11-16 12:30:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:08,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-11-16 12:30:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:08,971 INFO L225 Difference]: With dead ends: 4043 [2022-11-16 12:30:08,971 INFO L226 Difference]: Without dead ends: 3498 [2022-11-16 12:30:08,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:08,975 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 72 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:08,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 600 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:30:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2022-11-16 12:30:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3454. [2022-11-16 12:30:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 2924 states have (on average 1.3991108071135432) internal successors, (4091), 2969 states have internal predecessors, (4091), 316 states have call successors, (316), 184 states have call predecessors, (316), 212 states have return successors, (463), 316 states have call predecessors, (463), 312 states have call successors, (463) [2022-11-16 12:30:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 4870 transitions. [2022-11-16 12:30:09,472 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 4870 transitions. Word has length 68 [2022-11-16 12:30:09,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:09,473 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 4870 transitions. [2022-11-16 12:30:09,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:30:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 4870 transitions. [2022-11-16 12:30:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:30:09,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:09,479 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] [2022-11-16 12:30:09,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:09,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:30:09,686 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:09,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1426484957, now seen corresponding path program 1 times [2022-11-16 12:30:09,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:09,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513018135] [2022-11-16 12:30:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:09,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:09,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:30:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:09,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:30:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:09,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 12:30:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:30:09,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:09,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513018135] [2022-11-16 12:30:09,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513018135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:09,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050426053] [2022-11-16 12:30:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:09,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:09,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:09,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:09,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:30:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:30:09,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:10,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:30:10,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050426053] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:10,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:30:10,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-11-16 12:30:10,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964190984] [2022-11-16 12:30:10,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:10,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:30:10,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:10,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:30:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:10,134 INFO L87 Difference]: Start difference. First operand 3454 states and 4870 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) [2022-11-16 12:30:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:10,683 INFO L93 Difference]: Finished difference Result 3506 states and 4932 transitions. [2022-11-16 12:30:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:30:10,684 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 [2022-11-16 12:30:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:10,701 INFO L225 Difference]: With dead ends: 3506 [2022-11-16 12:30:10,701 INFO L226 Difference]: Without dead ends: 3503 [2022-11-16 12:30:10,703 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 [2022-11-16 12:30:10,704 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 493 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:10,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 376 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:30:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2022-11-16 12:30:11,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3453. [2022-11-16 12:30:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 2924 states have (on average 1.3984268125854993) internal successors, (4089), 2968 states have internal predecessors, (4089), 315 states have call successors, (315), 184 states have call predecessors, (315), 212 states have return successors, (463), 316 states have call predecessors, (463), 312 states have call successors, (463) [2022-11-16 12:30:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 4867 transitions. [2022-11-16 12:30:11,082 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 4867 transitions. Word has length 68 [2022-11-16 12:30:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:11,083 INFO L495 AbstractCegarLoop]: Abstraction has 3453 states and 4867 transitions. [2022-11-16 12:30:11,084 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) [2022-11-16 12:30:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 4867 transitions. [2022-11-16 12:30:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:30:11,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:11,088 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] [2022-11-16 12:30:11,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 12:30:11,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:30:11,294 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:11,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1272047869, now seen corresponding path program 1 times [2022-11-16 12:30:11,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:11,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099012499] [2022-11-16 12:30:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:11,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:11,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:30:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:11,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:30:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:11,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 12:30:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:30:11,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099012499] [2022-11-16 12:30:11,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099012499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014989313] [2022-11-16 12:30:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:11,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:11,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:11,417 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:11,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:30:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:11,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:30:11,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:11,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:30:11,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014989313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:11,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:11,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-16 12:30:11,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205994272] [2022-11-16 12:30:11,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:11,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:30:11,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:11,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:30:11,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:30:11,922 INFO L87 Difference]: Start difference. First operand 3453 states and 4867 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) [2022-11-16 12:30:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:13,992 INFO L93 Difference]: Finished difference Result 4963 states and 6805 transitions. [2022-11-16 12:30:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:30:13,993 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 [2022-11-16 12:30:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:14,012 INFO L225 Difference]: With dead ends: 4963 [2022-11-16 12:30:14,013 INFO L226 Difference]: Without dead ends: 4467 [2022-11-16 12:30:14,017 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 [2022-11-16 12:30:14,017 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 664 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 2438 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:14,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 2438 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:30:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2022-11-16 12:30:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3832. [2022-11-16 12:30:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3264 states have (on average 1.3789828431372548) internal successors, (4501), 3316 states have internal predecessors, (4501), 335 states have call successors, (335), 198 states have call predecessors, (335), 231 states have return successors, (497), 333 states have call predecessors, (497), 332 states have call successors, (497) [2022-11-16 12:30:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 5333 transitions. [2022-11-16 12:30:14,619 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 5333 transitions. Word has length 69 [2022-11-16 12:30:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:14,620 INFO L495 AbstractCegarLoop]: Abstraction has 3832 states and 5333 transitions. [2022-11-16 12:30:14,620 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) [2022-11-16 12:30:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 5333 transitions. [2022-11-16 12:30:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 12:30:14,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:14,628 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] [2022-11-16 12:30:14,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:14,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:14,835 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash -290000336, now seen corresponding path program 1 times [2022-11-16 12:30:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:14,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491192368] [2022-11-16 12:30:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:14,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:14,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:30:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:14,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:30:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:14,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 12:30:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:14,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:30:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:30:14,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:14,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491192368] [2022-11-16 12:30:14,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491192368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:14,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111296466] [2022-11-16 12:30:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:14,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:14,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:14,956 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:14,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:30:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:30:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:30:15,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:15,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111296466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:15,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:15,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 12:30:15,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845518073] [2022-11-16 12:30:15,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:15,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:15,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:15,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:15,133 INFO L87 Difference]: Start difference. First operand 3832 states and 5333 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) [2022-11-16 12:30:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:15,612 INFO L93 Difference]: Finished difference Result 4523 states and 6208 transitions. [2022-11-16 12:30:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:15,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-11-16 12:30:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:15,634 INFO L225 Difference]: With dead ends: 4523 [2022-11-16 12:30:15,634 INFO L226 Difference]: Without dead ends: 3754 [2022-11-16 12:30:15,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:15,638 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 247 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:15,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 391 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:30:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-11-16 12:30:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3745. [2022-11-16 12:30:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3745 states, 3187 states have (on average 1.3796673988076562) internal successors, (4397), 3238 states have internal predecessors, (4397), 331 states have call successors, (331), 194 states have call predecessors, (331), 225 states have return successors, (489), 328 states have call predecessors, (489), 328 states have call successors, (489) [2022-11-16 12:30:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 5217 transitions. [2022-11-16 12:30:16,137 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 5217 transitions. Word has length 88 [2022-11-16 12:30:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:16,137 INFO L495 AbstractCegarLoop]: Abstraction has 3745 states and 5217 transitions. [2022-11-16 12:30:16,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:30:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 5217 transitions. [2022-11-16 12:30:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 12:30:16,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:16,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:16,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:16,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:30:16,354 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1575033221, now seen corresponding path program 1 times [2022-11-16 12:30:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:16,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087332541] [2022-11-16 12:30:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:16,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:16,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:30:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:16,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:30:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:16,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 12:30:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:16,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:30:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:16,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-16 12:30:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 12:30:16,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:16,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087332541] [2022-11-16 12:30:16,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087332541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906624048] [2022-11-16 12:30:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:16,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:16,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:16,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:30:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:16,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:30:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:30:16,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:16,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906624048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:16,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:16,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 12:30:16,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239355396] [2022-11-16 12:30:16,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:16,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:16,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:16,634 INFO L87 Difference]: Start difference. First operand 3745 states and 5217 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:30:16,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:16,996 INFO L93 Difference]: Finished difference Result 4122 states and 5678 transitions. [2022-11-16 12:30:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-11-16 12:30:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:17,019 INFO L225 Difference]: With dead ends: 4122 [2022-11-16 12:30:17,019 INFO L226 Difference]: Without dead ends: 2804 [2022-11-16 12:30:17,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:17,024 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 61 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:17,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 595 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:30:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2022-11-16 12:30:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2804. [2022-11-16 12:30:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2349 states have (on average 1.4355044699872286) internal successors, (3372), 2384 states have internal predecessors, (3372), 274 states have call successors, (274), 157 states have call predecessors, (274), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2022-11-16 12:30:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4043 transitions. [2022-11-16 12:30:17,376 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4043 transitions. Word has length 103 [2022-11-16 12:30:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:17,377 INFO L495 AbstractCegarLoop]: Abstraction has 2804 states and 4043 transitions. [2022-11-16 12:30:17,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:30:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4043 transitions. [2022-11-16 12:30:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 12:30:17,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:17,386 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:17,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:17,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:30:17,592 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:17,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:17,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1375832156, now seen corresponding path program 1 times [2022-11-16 12:30:17,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:17,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385881708] [2022-11-16 12:30:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:17,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:17,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:17,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:17,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:17,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:17,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:17,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:30:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:17,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:17,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:30:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:30:17,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385881708] [2022-11-16 12:30:17,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385881708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71749458] [2022-11-16 12:30:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:17,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:17,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:17,754 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:17,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:30:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:17,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:30:17,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:30:17,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:17,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71749458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:17,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:17,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-16 12:30:17,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977051666] [2022-11-16 12:30:17,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:17,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:17,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:17,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:17,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:17,947 INFO L87 Difference]: Start difference. First operand 2804 states and 4043 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 12:30:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:18,542 INFO L93 Difference]: Finished difference Result 8245 states and 11965 transitions. [2022-11-16 12:30:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2022-11-16 12:30:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:18,566 INFO L225 Difference]: With dead ends: 8245 [2022-11-16 12:30:18,567 INFO L226 Difference]: Without dead ends: 5453 [2022-11-16 12:30:18,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:18,577 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 152 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:18,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 374 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:30:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2022-11-16 12:30:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 5397. [2022-11-16 12:30:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5397 states, 4528 states have (on average 1.4339664310954063) internal successors, (6493), 4596 states have internal predecessors, (6493), 512 states have call successors, (512), 309 states have call predecessors, (512), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2022-11-16 12:30:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5397 states to 5397 states and 7750 transitions. [2022-11-16 12:30:19,270 INFO L78 Accepts]: Start accepts. Automaton has 5397 states and 7750 transitions. Word has length 111 [2022-11-16 12:30:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:19,271 INFO L495 AbstractCegarLoop]: Abstraction has 5397 states and 7750 transitions. [2022-11-16 12:30:19,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 12:30:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 5397 states and 7750 transitions. [2022-11-16 12:30:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 12:30:19,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:19,284 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:19,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:19,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:30:19,497 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:19,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:19,497 INFO L85 PathProgramCache]: Analyzing trace with hash 483275324, now seen corresponding path program 1 times [2022-11-16 12:30:19,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:19,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634585663] [2022-11-16 12:30:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:19,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:30:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:30:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:30:19,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:19,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634585663] [2022-11-16 12:30:19,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634585663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:19,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758330700] [2022-11-16 12:30:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:19,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:19,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:19,656 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:19,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:30:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:30:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:30:19,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:19,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758330700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:19,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:19,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 12:30:19,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730060224] [2022-11-16 12:30:19,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:19,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:19,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:19,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:19,805 INFO L87 Difference]: Start difference. First operand 5397 states and 7750 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:30:20,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:20,836 INFO L93 Difference]: Finished difference Result 15785 states and 22914 transitions. [2022-11-16 12:30:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2022-11-16 12:30:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:20,877 INFO L225 Difference]: With dead ends: 15785 [2022-11-16 12:30:20,877 INFO L226 Difference]: Without dead ends: 10401 [2022-11-16 12:30:20,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:20,893 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 153 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:20,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 544 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:30:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2022-11-16 12:30:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 10401. [2022-11-16 12:30:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10401 states, 8719 states have (on average 1.4182819130634248) internal successors, (12366), 8836 states have internal predecessors, (12366), 977 states have call successors, (977), 609 states have call predecessors, (977), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2022-11-16 12:30:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10401 states to 10401 states and 14939 transitions. [2022-11-16 12:30:21,793 INFO L78 Accepts]: Start accepts. Automaton has 10401 states and 14939 transitions. Word has length 111 [2022-11-16 12:30:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:21,794 INFO L495 AbstractCegarLoop]: Abstraction has 10401 states and 14939 transitions. [2022-11-16 12:30:21,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:30:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10401 states and 14939 transitions. [2022-11-16 12:30:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-16 12:30:21,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:21,829 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:21,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:22,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:22,036 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 142639029, now seen corresponding path program 1 times [2022-11-16 12:30:22,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:22,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598695678] [2022-11-16 12:30:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:22,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:30:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-16 12:30:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-16 12:30:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:30:22,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:22,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598695678] [2022-11-16 12:30:22,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598695678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:22,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242720286] [2022-11-16 12:30:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:22,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:22,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:22,222 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:22,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:30:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:30:22,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:30:22,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:22,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242720286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:22,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:22,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-16 12:30:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923233080] [2022-11-16 12:30:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:22,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:22,521 INFO L87 Difference]: Start difference. First operand 10401 states and 14939 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:30:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:24,304 INFO L93 Difference]: Finished difference Result 30737 states and 44476 transitions. [2022-11-16 12:30:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:24,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2022-11-16 12:30:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:24,395 INFO L225 Difference]: With dead ends: 30737 [2022-11-16 12:30:24,395 INFO L226 Difference]: Without dead ends: 20353 [2022-11-16 12:30:24,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:24,432 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 110 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:24,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 395 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:30:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20353 states. [2022-11-16 12:30:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20353 to 20141. [2022-11-16 12:30:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20141 states, 16879 states have (on average 1.4133538716748621) internal successors, (23856), 17110 states have internal predecessors, (23856), 1871 states have call successors, (1871), 1199 states have call predecessors, (1871), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2022-11-16 12:30:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20141 states to 20141 states and 28765 transitions. [2022-11-16 12:30:26,176 INFO L78 Accepts]: Start accepts. Automaton has 20141 states and 28765 transitions. Word has length 143 [2022-11-16 12:30:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:26,176 INFO L495 AbstractCegarLoop]: Abstraction has 20141 states and 28765 transitions. [2022-11-16 12:30:26,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:30:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand 20141 states and 28765 transitions. [2022-11-16 12:30:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-16 12:30:26,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:26,241 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:26,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:26,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:26,447 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash 28732006, now seen corresponding path program 1 times [2022-11-16 12:30:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9008021] [2022-11-16 12:30:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 12:30:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 12:30:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-16 12:30:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-16 12:30:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 12:30:26,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:26,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9008021] [2022-11-16 12:30:26,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9008021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:26,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797116588] [2022-11-16 12:30:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:26,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:26,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:26,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:30:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:26,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:30:26,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:30:26,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:26,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797116588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:26,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:26,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 12:30:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416230805] [2022-11-16 12:30:26,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:26,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:26,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:26,932 INFO L87 Difference]: Start difference. First operand 20141 states and 28765 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:30:29,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:29,599 INFO L93 Difference]: Finished difference Result 42657 states and 61614 transitions. [2022-11-16 12:30:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:29,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2022-11-16 12:30:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:29,689 INFO L225 Difference]: With dead ends: 42657 [2022-11-16 12:30:29,689 INFO L226 Difference]: Without dead ends: 22535 [2022-11-16 12:30:29,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:29,738 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 130 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:29,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 226 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:30:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22535 states. [2022-11-16 12:30:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22535 to 22535. [2022-11-16 12:30:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22535 states, 19061 states have (on average 1.3748491684591575) internal successors, (26206), 19292 states have internal predecessors, (26206), 1925 states have call successors, (1925), 1357 states have call predecessors, (1925), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2022-11-16 12:30:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22535 states to 22535 states and 31237 transitions. [2022-11-16 12:30:32,435 INFO L78 Accepts]: Start accepts. Automaton has 22535 states and 31237 transitions. Word has length 160 [2022-11-16 12:30:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:32,436 INFO L495 AbstractCegarLoop]: Abstraction has 22535 states and 31237 transitions. [2022-11-16 12:30:32,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:30:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 22535 states and 31237 transitions. [2022-11-16 12:30:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-16 12:30:32,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:32,489 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:32,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:32,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:30:32,695 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash -124896125, now seen corresponding path program 1 times [2022-11-16 12:30:32,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:32,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362393877] [2022-11-16 12:30:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:32,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 12:30:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 12:30:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-16 12:30:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-16 12:30:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-16 12:30:32,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:32,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362393877] [2022-11-16 12:30:32,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362393877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:32,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416615052] [2022-11-16 12:30:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:32,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:32,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:32,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:32,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:30:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:33,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:30:33,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 12:30:33,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:33,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416615052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:33,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:33,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 12:30:33,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220420583] [2022-11-16 12:30:33,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:33,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:33,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:33,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:33,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:33,100 INFO L87 Difference]: Start difference. First operand 22535 states and 31237 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 12:30:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:35,400 INFO L93 Difference]: Finished difference Result 39568 states and 54775 transitions. [2022-11-16 12:30:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:35,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2022-11-16 12:30:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:35,506 INFO L225 Difference]: With dead ends: 39568 [2022-11-16 12:30:35,506 INFO L226 Difference]: Without dead ends: 24075 [2022-11-16 12:30:35,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:35,544 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 131 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:35,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 392 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:30:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24075 states. [2022-11-16 12:30:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24075 to 23935. [2022-11-16 12:30:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23935 states, 20349 states have (on average 1.350140056022409) internal successors, (27474), 20580 states have internal predecessors, (27474), 1945 states have call successors, (1945), 1449 states have call predecessors, (1945), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2022-11-16 12:30:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23935 states to 23935 states and 32637 transitions. [2022-11-16 12:30:38,589 INFO L78 Accepts]: Start accepts. Automaton has 23935 states and 32637 transitions. Word has length 160 [2022-11-16 12:30:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:38,590 INFO L495 AbstractCegarLoop]: Abstraction has 23935 states and 32637 transitions. [2022-11-16 12:30:38,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 12:30:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 23935 states and 32637 transitions. [2022-11-16 12:30:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-16 12:30:38,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:38,638 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:38,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:38,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 12:30:38,839 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:38,839 INFO L85 PathProgramCache]: Analyzing trace with hash -402645848, now seen corresponding path program 1 times [2022-11-16 12:30:38,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:38,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813604607] [2022-11-16 12:30:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:38,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:30:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 12:30:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-16 12:30:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:39,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-16 12:30:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-16 12:30:39,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:39,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813604607] [2022-11-16 12:30:39,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813604607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:39,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680568684] [2022-11-16 12:30:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:39,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:39,016 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:39,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:30:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:39,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:30:39,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 12:30:39,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:39,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680568684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:39,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:39,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 12:30:39,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218750635] [2022-11-16 12:30:39,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:39,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:39,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:39,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:39,186 INFO L87 Difference]: Start difference. First operand 23935 states and 32637 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 12:30:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:44,036 INFO L93 Difference]: Finished difference Result 70545 states and 97151 transitions. [2022-11-16 12:30:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:44,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2022-11-16 12:30:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:44,259 INFO L225 Difference]: With dead ends: 70545 [2022-11-16 12:30:44,260 INFO L226 Difference]: Without dead ends: 46629 [2022-11-16 12:30:44,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:44,323 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 163 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:44,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 553 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:30:44,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46629 states. [2022-11-16 12:30:49,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46629 to 46585. [2022-11-16 12:30:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 39585 states have (on average 1.338890994063408) internal successors, (53000), 40046 states have internal predecessors, (53000), 3775 states have call successors, (3775), 2841 states have call predecessors, (3775), 3224 states have return successors, (7134), 3761 states have call predecessors, (7134), 3773 states have call successors, (7134) [2022-11-16 12:30:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 63909 transitions. [2022-11-16 12:30:49,859 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 63909 transitions. Word has length 161 [2022-11-16 12:30:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:49,860 INFO L495 AbstractCegarLoop]: Abstraction has 46585 states and 63909 transitions. [2022-11-16 12:30:49,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 12:30:49,861 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 63909 transitions. [2022-11-16 12:30:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-16 12:30:49,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:49,983 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:49,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:50,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:50,190 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1546394152, now seen corresponding path program 1 times [2022-11-16 12:30:50,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:50,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440833993] [2022-11-16 12:30:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:50,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:30:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:30:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 12:30:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:30:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:30:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:30:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 12:30:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-16 12:30:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 12:30:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-16 12:30:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 12:30:50,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:50,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440833993] [2022-11-16 12:30:50,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440833993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:50,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265486440] [2022-11-16 12:30:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:50,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:50,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:50,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:50,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_163ca222-ba62-4504-9221-1bcccc4fe666/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:30:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:30:50,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 12:30:50,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:50,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265486440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:50,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:50,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 12:30:50,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988688998] [2022-11-16 12:30:50,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:50,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:50,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:50,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:50,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:50,839 INFO L87 Difference]: Start difference. First operand 46585 states and 63909 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:30:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:54,569 INFO L93 Difference]: Finished difference Result 76949 states and 107564 transitions. [2022-11-16 12:30:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:54,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2022-11-16 12:30:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:54,715 INFO L225 Difference]: With dead ends: 76949 [2022-11-16 12:30:54,715 INFO L226 Difference]: Without dead ends: 39401 [2022-11-16 12:30:54,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:54,815 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 125 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:54,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 224 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:30:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39401 states.