./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a --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 6d6da8f3ee43e0b2f144002fad1e1be3bc4062b8e0f7b0d6768d1ce0f0c5101f --- 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-b5237d8 [2022-11-21 13:57:16,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:57:16,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:57:16,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:57:16,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:57:16,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:57:16,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:57:16,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:57:16,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:57:16,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:57:16,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:57:16,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:57:16,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:57:16,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:57:16,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:57:16,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:57:16,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:57:16,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:57:16,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:57:16,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:57:16,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:57:16,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:57:16,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:57:16,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:57:16,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:57:16,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:57:16,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:57:16,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:57:16,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:57:16,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:57:16,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:57:16,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:57:16,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:57:16,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:57:16,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:57:16,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:57:16,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:57:16,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:57:16,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:57:16,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:57:16,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:57:16,373 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 13:57:16,408 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:57:16,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:57:16,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:57:16,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:57:16,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:57:16,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:57:16,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:57:16,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:57:16,412 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:57:16,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:57:16,413 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:57:16,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:57:16,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:57:16,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:57:16,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:57:16,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:57:16,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:57:16,415 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:57:16,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:57:16,417 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:57:16,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:57:16,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:57:16,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:57:16,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:57:16,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:57:16,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:57:16,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:57:16,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:57:16,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:57:16,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:57:16,419 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:57:16,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:57:16,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:57:16,420 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_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d6da8f3ee43e0b2f144002fad1e1be3bc4062b8e0f7b0d6768d1ce0f0c5101f [2022-11-21 13:57:16,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:57:16,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:57:16,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:57:16,751 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:57:16,751 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:57:16,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-11-21 13:57:19,647 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:57:19,886 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:57:19,887 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-11-21 13:57:19,909 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/data/be87b7ce3/f740923ce7934b708e58a8ac5f2c00fc/FLAG1c32e5a6d [2022-11-21 13:57:19,924 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/data/be87b7ce3/f740923ce7934b708e58a8ac5f2c00fc [2022-11-21 13:57:19,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:57:19,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:57:19,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:57:19,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:57:19,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:57:19,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:57:19" (1/1) ... [2022-11-21 13:57:19,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb245b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:19, skipping insertion in model container [2022-11-21 13:57:19,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:57:19" (1/1) ... [2022-11-21 13:57:19,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:57:20,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:57:20,235 WARN L237 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_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2022-11-21 13:57:20,333 WARN L237 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_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2022-11-21 13:57:20,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:57:20,505 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:57:20,517 WARN L237 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_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2022-11-21 13:57:20,561 WARN L237 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_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2022-11-21 13:57:20,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:57:20,633 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:57:20,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20 WrapperNode [2022-11-21 13:57:20,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:57:20,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:57:20,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:57:20,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:57:20,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,698 INFO L138 Inliner]: procedures = 73, calls = 88, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 929 [2022-11-21 13:57:20,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:57:20,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:57:20,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:57:20,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:57:20,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,773 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:57:20,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:57:20,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:57:20,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:57:20,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2022-11-21 13:57:20,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:57:20,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:20,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:57:20,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:57:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:57:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-21 13:57:20,971 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-21 13:57:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-21 13:57:20,973 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-21 13:57:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-21 13:57:20,973 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-21 13:57:20,974 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-21 13:57:20,974 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-21 13:57:20,974 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-21 13:57:20,974 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-21 13:57:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-21 13:57:20,975 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-21 13:57:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-21 13:57:20,975 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-21 13:57:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-21 13:57:20,975 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-21 13:57:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-21 13:57:20,976 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-21 13:57:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-21 13:57:20,976 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-21 13:57:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-21 13:57:20,977 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-21 13:57:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:57:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-21 13:57:20,977 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-21 13:57:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-21 13:57:20,978 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-21 13:57:20,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:57:20,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:57:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-21 13:57:20,979 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-21 13:57:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-21 13:57:20,980 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-21 13:57:21,136 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:57:21,138 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:57:22,077 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:57:22,088 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:57:22,088 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-21 13:57:22,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:22 BoogieIcfgContainer [2022-11-21 13:57:22,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:57:22,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:57:22,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:57:22,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:57:22,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:57:19" (1/3) ... [2022-11-21 13:57:22,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d392964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:57:22, skipping insertion in model container [2022-11-21 13:57:22,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (2/3) ... [2022-11-21 13:57:22,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d392964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:57:22, skipping insertion in model container [2022-11-21 13:57:22,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:22" (3/3) ... [2022-11-21 13:57:22,100 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-11-21 13:57:22,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:57:22,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 13:57:22,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:57:22,190 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;@4ad87200, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:57:22,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:57:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 383 states have (on average 1.6370757180156659) internal successors, (627), 391 states have internal predecessors, (627), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-21 13:57:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 13:57:22,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:22,210 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] [2022-11-21 13:57:22,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1192357691, now seen corresponding path program 1 times [2022-11-21 13:57:22,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:22,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288476924] [2022-11-21 13:57:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:22,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:22,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:22,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:22,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:22,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:22,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:22,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:22,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:22,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:22,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288476924] [2022-11-21 13:57:22,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288476924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:22,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:22,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 13:57:22,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874806184] [2022-11-21 13:57:22,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:22,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 13:57:22,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:22,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 13:57:22,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:22,982 INFO L87 Difference]: Start difference. First operand has 441 states, 383 states have (on average 1.6370757180156659) internal successors, (627), 391 states have internal predecessors, (627), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 13:57:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:24,736 INFO L93 Difference]: Finished difference Result 990 states and 1576 transitions. [2022-11-21 13:57:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:57:24,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-21 13:57:24,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:24,770 INFO L225 Difference]: With dead ends: 990 [2022-11-21 13:57:24,770 INFO L226 Difference]: Without dead ends: 565 [2022-11-21 13:57:24,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-21 13:57:24,787 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 1096 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:24,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 2018 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 13:57:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-21 13:57:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 526. [2022-11-21 13:57:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 451 states have (on average 1.5210643015521064) internal successors, (686), 458 states have internal predecessors, (686), 51 states have call successors, (51), 22 states have call predecessors, (51), 22 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2022-11-21 13:57:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 789 transitions. [2022-11-21 13:57:24,905 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 789 transitions. Word has length 65 [2022-11-21 13:57:24,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:24,906 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 789 transitions. [2022-11-21 13:57:24,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 13:57:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 789 transitions. [2022-11-21 13:57:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 13:57:24,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:24,910 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] [2022-11-21 13:57:24,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:57:24,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash -929120350, now seen corresponding path program 1 times [2022-11-21 13:57:24,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:24,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604829253] [2022-11-21 13:57:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:25,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:25,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:25,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:25,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:25,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:25,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:25,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:25,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604829253] [2022-11-21 13:57:25,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604829253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:25,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:25,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 13:57:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816282094] [2022-11-21 13:57:25,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:25,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 13:57:25,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 13:57:25,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:25,150 INFO L87 Difference]: Start difference. First operand 526 states and 789 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 13:57:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:26,642 INFO L93 Difference]: Finished difference Result 873 states and 1266 transitions. [2022-11-21 13:57:26,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 13:57:26,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-21 13:57:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:26,649 INFO L225 Difference]: With dead ends: 873 [2022-11-21 13:57:26,649 INFO L226 Difference]: Without dead ends: 696 [2022-11-21 13:57:26,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-11-21 13:57:26,651 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 1626 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:26,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1654 Valid, 1840 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 13:57:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-11-21 13:57:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 622. [2022-11-21 13:57:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 527 states have (on average 1.4990512333965844) internal successors, (790), 536 states have internal predecessors, (790), 62 states have call successors, (62), 29 states have call predecessors, (62), 31 states have return successors, (71), 60 states have call predecessors, (71), 58 states have call successors, (71) [2022-11-21 13:57:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 923 transitions. [2022-11-21 13:57:26,743 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 923 transitions. Word has length 65 [2022-11-21 13:57:26,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:26,744 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 923 transitions. [2022-11-21 13:57:26,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 13:57:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 923 transitions. [2022-11-21 13:57:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 13:57:26,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:26,747 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] [2022-11-21 13:57:26,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:57:26,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1337260836, now seen corresponding path program 1 times [2022-11-21 13:57:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:26,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323377885] [2022-11-21 13:57:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:26,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:26,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:26,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:26,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:26,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:26,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:26,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:26,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:26,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:26,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323377885] [2022-11-21 13:57:26,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323377885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:26,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:26,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 13:57:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292252282] [2022-11-21 13:57:26,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:26,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:57:26,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:26,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:57:26,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:57:26,931 INFO L87 Difference]: Start difference. First operand 622 states and 923 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 13:57:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:28,387 INFO L93 Difference]: Finished difference Result 923 states and 1337 transitions. [2022-11-21 13:57:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 13:57:28,388 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-11-21 13:57:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:28,391 INFO L225 Difference]: With dead ends: 923 [2022-11-21 13:57:28,392 INFO L226 Difference]: Without dead ends: 656 [2022-11-21 13:57:28,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:57:28,394 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 858 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:28,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 2315 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 13:57:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-11-21 13:57:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 627. [2022-11-21 13:57:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 531 states have (on average 1.4915254237288136) internal successors, (792), 540 states have internal predecessors, (792), 62 states have call successors, (62), 29 states have call predecessors, (62), 32 states have return successors, (72), 61 states have call predecessors, (72), 58 states have call successors, (72) [2022-11-21 13:57:28,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 926 transitions. [2022-11-21 13:57:28,443 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 926 transitions. Word has length 65 [2022-11-21 13:57:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:28,444 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 926 transitions. [2022-11-21 13:57:28,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 13:57:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 926 transitions. [2022-11-21 13:57:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 13:57:28,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:28,447 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] [2022-11-21 13:57:28,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 13:57:28,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash 307901538, now seen corresponding path program 1 times [2022-11-21 13:57:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555756505] [2022-11-21 13:57:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:28,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:28,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:28,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:28,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:28,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:28,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:28,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:28,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555756505] [2022-11-21 13:57:28,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555756505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:28,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:28,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 13:57:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672240499] [2022-11-21 13:57:28,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:28,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:57:28,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:28,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:57:28,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:57:28,630 INFO L87 Difference]: Start difference. First operand 627 states and 926 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 13:57:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:30,164 INFO L93 Difference]: Finished difference Result 945 states and 1359 transitions. [2022-11-21 13:57:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 13:57:30,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-11-21 13:57:30,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:30,169 INFO L225 Difference]: With dead ends: 945 [2022-11-21 13:57:30,169 INFO L226 Difference]: Without dead ends: 673 [2022-11-21 13:57:30,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-21 13:57:30,171 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 861 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:30,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 2314 Invalid, 1861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 13:57:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-21 13:57:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 642. [2022-11-21 13:57:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 543 states have (on average 1.4806629834254144) internal successors, (804), 552 states have internal predecessors, (804), 62 states have call successors, (62), 29 states have call predecessors, (62), 35 states have return successors, (75), 64 states have call predecessors, (75), 58 states have call successors, (75) [2022-11-21 13:57:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 941 transitions. [2022-11-21 13:57:30,217 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 941 transitions. Word has length 65 [2022-11-21 13:57:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:30,217 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 941 transitions. [2022-11-21 13:57:30,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 13:57:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 941 transitions. [2022-11-21 13:57:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 13:57:30,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:30,220 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] [2022-11-21 13:57:30,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 13:57:30,220 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:30,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1694104932, now seen corresponding path program 1 times [2022-11-21 13:57:30,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:30,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331561318] [2022-11-21 13:57:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:30,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:30,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:30,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:30,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:30,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:30,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:30,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:30,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:30,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:30,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331561318] [2022-11-21 13:57:30,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331561318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:30,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:30,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 13:57:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872764160] [2022-11-21 13:57:30,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:30,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 13:57:30,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 13:57:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:30,424 INFO L87 Difference]: Start difference. First operand 642 states and 941 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 13:57:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:31,893 INFO L93 Difference]: Finished difference Result 1034 states and 1452 transitions. [2022-11-21 13:57:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 13:57:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-21 13:57:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:31,897 INFO L225 Difference]: With dead ends: 1034 [2022-11-21 13:57:31,898 INFO L226 Difference]: Without dead ends: 749 [2022-11-21 13:57:31,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-21 13:57:31,900 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1292 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:31,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 1958 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 13:57:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-21 13:57:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 654. [2022-11-21 13:57:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 553 states have (on average 1.4719710669077757) internal successors, (814), 562 states have internal predecessors, (814), 63 states have call successors, (63), 30 states have call predecessors, (63), 36 states have return successors, (74), 65 states have call predecessors, (74), 59 states have call successors, (74) [2022-11-21 13:57:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 951 transitions. [2022-11-21 13:57:31,943 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 951 transitions. Word has length 65 [2022-11-21 13:57:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:31,943 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 951 transitions. [2022-11-21 13:57:31,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 13:57:31,944 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 951 transitions. [2022-11-21 13:57:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 13:57:31,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:31,946 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] [2022-11-21 13:57:31,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 13:57:31,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:31,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1560091426, now seen corresponding path program 1 times [2022-11-21 13:57:31,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:31,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013807181] [2022-11-21 13:57:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:31,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:32,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:32,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:32,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:32,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:32,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:32,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:32,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:32,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013807181] [2022-11-21 13:57:32,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013807181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:32,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:32,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:57:32,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522720523] [2022-11-21 13:57:32,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:32,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:57:32,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:57:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:57:32,094 INFO L87 Difference]: Start difference. First operand 654 states and 951 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 13:57:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:33,104 INFO L93 Difference]: Finished difference Result 1296 states and 1798 transitions. [2022-11-21 13:57:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 13:57:33,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-21 13:57:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:33,110 INFO L225 Difference]: With dead ends: 1296 [2022-11-21 13:57:33,110 INFO L226 Difference]: Without dead ends: 1000 [2022-11-21 13:57:33,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-11-21 13:57:33,112 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1587 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:33,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1617 Valid, 1304 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 13:57:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-11-21 13:57:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 944. [2022-11-21 13:57:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 777 states have (on average 1.416988416988417) internal successors, (1101), 793 states have internal predecessors, (1101), 98 states have call successors, (98), 52 states have call predecessors, (98), 67 states have return successors, (131), 105 states have call predecessors, (131), 94 states have call successors, (131) [2022-11-21 13:57:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1330 transitions. [2022-11-21 13:57:33,175 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1330 transitions. Word has length 65 [2022-11-21 13:57:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:33,175 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1330 transitions. [2022-11-21 13:57:33,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 13:57:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1330 transitions. [2022-11-21 13:57:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-21 13:57:33,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:33,178 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] [2022-11-21 13:57:33,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 13:57:33,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1800845042, now seen corresponding path program 1 times [2022-11-21 13:57:33,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:33,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396963659] [2022-11-21 13:57:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:33,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:33,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:33,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:33,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:33,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:33,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:33,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:33,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:33,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396963659] [2022-11-21 13:57:33,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396963659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:33,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:33,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:57:33,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772634236] [2022-11-21 13:57:33,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:33,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:57:33,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:57:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:33,264 INFO L87 Difference]: Start difference. First operand 944 states and 1330 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 13:57:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:34,256 INFO L93 Difference]: Finished difference Result 2147 states and 2901 transitions. [2022-11-21 13:57:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 13:57:34,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-11-21 13:57:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:34,265 INFO L225 Difference]: With dead ends: 2147 [2022-11-21 13:57:34,265 INFO L226 Difference]: Without dead ends: 1540 [2022-11-21 13:57:34,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:57:34,268 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 764 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:34,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1569 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 13:57:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2022-11-21 13:57:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1425. [2022-11-21 13:57:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1156 states have (on average 1.3685121107266436) internal successors, (1582), 1175 states have internal predecessors, (1582), 143 states have call successors, (143), 96 states have call predecessors, (143), 124 states have return successors, (203), 160 states have call predecessors, (203), 139 states have call successors, (203) [2022-11-21 13:57:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1928 transitions. [2022-11-21 13:57:34,359 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1928 transitions. Word has length 66 [2022-11-21 13:57:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:34,360 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 1928 transitions. [2022-11-21 13:57:34,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 13:57:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1928 transitions. [2022-11-21 13:57:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-21 13:57:34,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:34,362 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] [2022-11-21 13:57:34,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 13:57:34,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:34,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1035882595, now seen corresponding path program 1 times [2022-11-21 13:57:34,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:34,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857392098] [2022-11-21 13:57:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:34,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:34,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:34,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:34,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:34,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:34,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:34,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:34,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:34,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:34,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857392098] [2022-11-21 13:57:34,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857392098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:34,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:34,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:57:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899437072] [2022-11-21 13:57:34,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:34,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:57:34,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:34,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:57:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:34,484 INFO L87 Difference]: Start difference. First operand 1425 states and 1928 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 13:57:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:35,467 INFO L93 Difference]: Finished difference Result 3613 states and 4734 transitions. [2022-11-21 13:57:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 13:57:35,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-11-21 13:57:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:35,480 INFO L225 Difference]: With dead ends: 3613 [2022-11-21 13:57:35,483 INFO L226 Difference]: Without dead ends: 2545 [2022-11-21 13:57:35,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:57:35,490 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 1583 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:35,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1614 Valid, 1012 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 13:57:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2022-11-21 13:57:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2287. [2022-11-21 13:57:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1822 states have (on average 1.3221734357848518) internal successors, (2409), 1851 states have internal predecessors, (2409), 241 states have call successors, (241), 180 states have call predecessors, (241), 222 states have return successors, (339), 262 states have call predecessors, (339), 237 states have call successors, (339) [2022-11-21 13:57:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 2989 transitions. [2022-11-21 13:57:35,682 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 2989 transitions. Word has length 66 [2022-11-21 13:57:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:35,683 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 2989 transitions. [2022-11-21 13:57:35,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 13:57:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 2989 transitions. [2022-11-21 13:57:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-21 13:57:35,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:35,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:35,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 13:57:35,686 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash 283948209, now seen corresponding path program 1 times [2022-11-21 13:57:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:35,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382724960] [2022-11-21 13:57:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:35,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:35,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:35,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:35,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:35,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:35,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:35,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:35,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382724960] [2022-11-21 13:57:35,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382724960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:35,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:35,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:57:35,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499182004] [2022-11-21 13:57:35,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:35,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:57:35,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:57:35,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:35,778 INFO L87 Difference]: Start difference. First operand 2287 states and 2989 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 13:57:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:36,678 INFO L93 Difference]: Finished difference Result 5197 states and 6639 transitions. [2022-11-21 13:57:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 13:57:36,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-11-21 13:57:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:36,694 INFO L225 Difference]: With dead ends: 5197 [2022-11-21 13:57:36,694 INFO L226 Difference]: Without dead ends: 3267 [2022-11-21 13:57:36,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:57:36,700 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 1564 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:36,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1595 Valid, 1047 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 13:57:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2022-11-21 13:57:36,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 3019. [2022-11-21 13:57:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2390 states have (on average 1.302510460251046) internal successors, (3113), 2427 states have internal predecessors, (3113), 321 states have call successors, (321), 250 states have call predecessors, (321), 306 states have return successors, (448), 348 states have call predecessors, (448), 317 states have call successors, (448) [2022-11-21 13:57:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 3882 transitions. [2022-11-21 13:57:36,953 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 3882 transitions. Word has length 72 [2022-11-21 13:57:36,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:36,955 INFO L495 AbstractCegarLoop]: Abstraction has 3019 states and 3882 transitions. [2022-11-21 13:57:36,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 13:57:36,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 3882 transitions. [2022-11-21 13:57:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-21 13:57:36,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:36,957 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:36,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 13:57:36,958 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:36,958 INFO L85 PathProgramCache]: Analyzing trace with hash -304350912, now seen corresponding path program 1 times [2022-11-21 13:57:36,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:36,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689629600] [2022-11-21 13:57:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:36,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:37,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:37,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:37,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:37,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:37,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:37,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:37,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689629600] [2022-11-21 13:57:37,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689629600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:37,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:37,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:57:37,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20760313] [2022-11-21 13:57:37,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:37,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:57:37,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:57:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:57:37,069 INFO L87 Difference]: Start difference. First operand 3019 states and 3882 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 13:57:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:38,102 INFO L93 Difference]: Finished difference Result 3793 states and 4813 transitions. [2022-11-21 13:57:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 13:57:38,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2022-11-21 13:57:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:38,124 INFO L225 Difference]: With dead ends: 3793 [2022-11-21 13:57:38,125 INFO L226 Difference]: Without dead ends: 3790 [2022-11-21 13:57:38,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-11-21 13:57:38,128 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 1892 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:38,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 1327 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 13:57:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-11-21 13:57:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 3513. [2022-11-21 13:57:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 2775 states have (on average 1.2918918918918918) internal successors, (3585), 2817 states have internal predecessors, (3585), 371 states have call successors, (371), 294 states have call predecessors, (371), 365 states have return successors, (527), 408 states have call predecessors, (527), 368 states have call successors, (527) [2022-11-21 13:57:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 4483 transitions. [2022-11-21 13:57:38,482 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 4483 transitions. Word has length 73 [2022-11-21 13:57:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:38,483 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 4483 transitions. [2022-11-21 13:57:38,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 13:57:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 4483 transitions. [2022-11-21 13:57:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-21 13:57:38,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:38,485 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:38,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 13:57:38,486 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:38,487 INFO L85 PathProgramCache]: Analyzing trace with hash -846258469, now seen corresponding path program 1 times [2022-11-21 13:57:38,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:38,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611464245] [2022-11-21 13:57:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:38,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:38,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:38,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:38,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:38,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:38,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:38,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:38,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:38,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:38,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611464245] [2022-11-21 13:57:38,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611464245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:38,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013605197] [2022-11-21 13:57:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:38,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:38,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:38,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:38,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:57:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:38,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:57:38,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:39,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:39,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013605197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:39,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:57:39,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2022-11-21 13:57:39,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15261375] [2022-11-21 13:57:39,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:39,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:57:39,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:57:39,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:57:39,418 INFO L87 Difference]: Start difference. First operand 3513 states and 4483 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-21 13:57:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:42,182 INFO L93 Difference]: Finished difference Result 7954 states and 9969 transitions. [2022-11-21 13:57:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 13:57:42,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2022-11-21 13:57:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:42,212 INFO L225 Difference]: With dead ends: 7954 [2022-11-21 13:57:42,213 INFO L226 Difference]: Without dead ends: 7951 [2022-11-21 13:57:42,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-11-21 13:57:42,217 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1811 mSDsluCounter, 2201 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1881 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:42,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1881 Valid, 2682 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-21 13:57:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2022-11-21 13:57:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 5303. [2022-11-21 13:57:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5303 states, 4179 states have (on average 1.2828427853553481) internal successors, (5361), 4243 states have internal predecessors, (5361), 555 states have call successors, (555), 452 states have call predecessors, (555), 567 states have return successors, (805), 614 states have call predecessors, (805), 552 states have call successors, (805) [2022-11-21 13:57:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5303 states to 5303 states and 6721 transitions. [2022-11-21 13:57:42,823 INFO L78 Accepts]: Start accepts. Automaton has 5303 states and 6721 transitions. Word has length 74 [2022-11-21 13:57:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:42,824 INFO L495 AbstractCegarLoop]: Abstraction has 5303 states and 6721 transitions. [2022-11-21 13:57:42,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-21 13:57:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 5303 states and 6721 transitions. [2022-11-21 13:57:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-21 13:57:42,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:42,827 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:42,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:43,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 13:57:43,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:43,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:43,034 INFO L85 PathProgramCache]: Analyzing trace with hash -931904896, now seen corresponding path program 2 times [2022-11-21 13:57:43,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:43,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78484308] [2022-11-21 13:57:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:43,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:43,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:43,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:43,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:43,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:43,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:43,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:43,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:43,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:43,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78484308] [2022-11-21 13:57:43,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78484308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:43,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:43,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:57:43,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143127116] [2022-11-21 13:57:43,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:43,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:57:43,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:43,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:57:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:43,118 INFO L87 Difference]: Start difference. First operand 5303 states and 6721 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 13:57:44,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:44,336 INFO L93 Difference]: Finished difference Result 7985 states and 10094 transitions. [2022-11-21 13:57:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:57:44,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2022-11-21 13:57:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:44,369 INFO L225 Difference]: With dead ends: 7985 [2022-11-21 13:57:44,369 INFO L226 Difference]: Without dead ends: 3910 [2022-11-21 13:57:44,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:57:44,379 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 1169 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:44,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 1434 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 13:57:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2022-11-21 13:57:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3675. [2022-11-21 13:57:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3675 states, 2907 states have (on average 1.2731338149294806) internal successors, (3701), 2949 states have internal predecessors, (3701), 387 states have call successors, (387), 308 states have call predecessors, (387), 379 states have return successors, (531), 424 states have call predecessors, (531), 384 states have call successors, (531) [2022-11-21 13:57:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 4619 transitions. [2022-11-21 13:57:44,731 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 4619 transitions. Word has length 77 [2022-11-21 13:57:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:44,731 INFO L495 AbstractCegarLoop]: Abstraction has 3675 states and 4619 transitions. [2022-11-21 13:57:44,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 13:57:44,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 4619 transitions. [2022-11-21 13:57:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-21 13:57:44,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:44,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:44,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 13:57:44,735 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:44,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash -840062387, now seen corresponding path program 1 times [2022-11-21 13:57:44,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:44,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261758198] [2022-11-21 13:57:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:44,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:44,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:44,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:44,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:44,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:44,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:44,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:44,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:44,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-21 13:57:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:57:44,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:44,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261758198] [2022-11-21 13:57:44,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261758198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:44,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:44,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 13:57:44,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954249347] [2022-11-21 13:57:44,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:44,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 13:57:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:44,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 13:57:44,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:44,875 INFO L87 Difference]: Start difference. First operand 3675 states and 4619 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 13:57:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:47,054 INFO L93 Difference]: Finished difference Result 10547 states and 13036 transitions. [2022-11-21 13:57:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 13:57:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2022-11-21 13:57:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:47,104 INFO L225 Difference]: With dead ends: 10547 [2022-11-21 13:57:47,105 INFO L226 Difference]: Without dead ends: 5910 [2022-11-21 13:57:47,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-11-21 13:57:47,114 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 990 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 2041 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:47,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 2041 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 13:57:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2022-11-21 13:57:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 5590. [2022-11-21 13:57:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 4365 states have (on average 1.2426116838487973) internal successors, (5424), 4450 states have internal predecessors, (5424), 591 states have call successors, (591), 482 states have call predecessors, (591), 632 states have return successors, (913), 664 states have call predecessors, (913), 588 states have call successors, (913) [2022-11-21 13:57:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 6928 transitions. [2022-11-21 13:57:47,586 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 6928 transitions. Word has length 84 [2022-11-21 13:57:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:47,586 INFO L495 AbstractCegarLoop]: Abstraction has 5590 states and 6928 transitions. [2022-11-21 13:57:47,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 13:57:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 6928 transitions. [2022-11-21 13:57:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-21 13:57:47,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:47,592 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:47,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 13:57:47,592 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:47,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:47,593 INFO L85 PathProgramCache]: Analyzing trace with hash 670528542, now seen corresponding path program 1 times [2022-11-21 13:57:47,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:47,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359503021] [2022-11-21 13:57:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:47,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:47,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:47,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:47,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:47,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:47,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:47,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-21 13:57:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:57:47,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:47,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359503021] [2022-11-21 13:57:47,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359503021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:47,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:47,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 13:57:47,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030647759] [2022-11-21 13:57:47,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:47,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:57:47,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:47,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:57:47,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:57:47,731 INFO L87 Difference]: Start difference. First operand 5590 states and 6928 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 13:57:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:49,686 INFO L93 Difference]: Finished difference Result 9593 states and 11768 transitions. [2022-11-21 13:57:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 13:57:49,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2022-11-21 13:57:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:49,705 INFO L225 Difference]: With dead ends: 9593 [2022-11-21 13:57:49,705 INFO L226 Difference]: Without dead ends: 5000 [2022-11-21 13:57:49,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-11-21 13:57:49,715 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 2216 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2260 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:49,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2260 Valid, 1748 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 13:57:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2022-11-21 13:57:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4666. [2022-11-21 13:57:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4666 states, 3654 states have (on average 1.2378215654077722) internal successors, (4523), 3721 states have internal predecessors, (4523), 492 states have call successors, (492), 397 states have call predecessors, (492), 518 states have return successors, (691), 554 states have call predecessors, (691), 489 states have call successors, (691) [2022-11-21 13:57:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4666 states to 4666 states and 5706 transitions. [2022-11-21 13:57:50,206 INFO L78 Accepts]: Start accepts. Automaton has 4666 states and 5706 transitions. Word has length 93 [2022-11-21 13:57:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:50,206 INFO L495 AbstractCegarLoop]: Abstraction has 4666 states and 5706 transitions. [2022-11-21 13:57:50,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 13:57:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4666 states and 5706 transitions. [2022-11-21 13:57:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-21 13:57:50,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:50,215 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:50,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 13:57:50,215 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1155770855, now seen corresponding path program 1 times [2022-11-21 13:57:50,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:50,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172448084] [2022-11-21 13:57:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:50,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-21 13:57:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-21 13:57:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-21 13:57:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-21 13:57:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-21 13:57:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-21 13:57:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-21 13:57:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-21 13:57:50,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:50,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172448084] [2022-11-21 13:57:50,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172448084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:50,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596272260] [2022-11-21 13:57:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:50,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:50,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:50,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:50,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:57:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:50,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:57:50,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 13:57:50,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:57:50,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596272260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:50,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:57:50,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2022-11-21 13:57:50,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754847288] [2022-11-21 13:57:50,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:50,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:57:50,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:50,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:57:50,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:57:50,660 INFO L87 Difference]: Start difference. First operand 4666 states and 5706 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-21 13:57:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:51,056 INFO L93 Difference]: Finished difference Result 6832 states and 8329 transitions. [2022-11-21 13:57:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:57:51,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2022-11-21 13:57:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:51,076 INFO L225 Difference]: With dead ends: 6832 [2022-11-21 13:57:51,077 INFO L226 Difference]: Without dead ends: 2527 [2022-11-21 13:57:51,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:57:51,089 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 34 mSDsluCounter, 2576 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3230 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:51,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3230 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2022-11-21 13:57:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2402. [2022-11-21 13:57:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 1967 states have (on average 1.2552109811896288) internal successors, (2469), 1983 states have internal predecessors, (2469), 216 states have call successors, (216), 163 states have call predecessors, (216), 217 states have return successors, (298), 256 states have call predecessors, (298), 213 states have call successors, (298) [2022-11-21 13:57:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 2983 transitions. [2022-11-21 13:57:51,315 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 2983 transitions. Word has length 145 [2022-11-21 13:57:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:51,315 INFO L495 AbstractCegarLoop]: Abstraction has 2402 states and 2983 transitions. [2022-11-21 13:57:51,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-21 13:57:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 2983 transitions. [2022-11-21 13:57:51,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-21 13:57:51,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:51,322 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:51,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:51,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 13:57:51,528 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:51,529 INFO L85 PathProgramCache]: Analyzing trace with hash -707927933, now seen corresponding path program 1 times [2022-11-21 13:57:51,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:51,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608707770] [2022-11-21 13:57:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:51,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-21 13:57:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-21 13:57:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-21 13:57:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-21 13:57:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-21 13:57:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-21 13:57:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-21 13:57:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-21 13:57:51,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608707770] [2022-11-21 13:57:51,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608707770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:51,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:51,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:57:51,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556319814] [2022-11-21 13:57:51,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:51,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:57:51,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:57:51,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:51,638 INFO L87 Difference]: Start difference. First operand 2402 states and 2983 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-21 13:57:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:52,563 INFO L93 Difference]: Finished difference Result 2467 states and 3051 transitions. [2022-11-21 13:57:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:57:52,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2022-11-21 13:57:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:52,569 INFO L225 Difference]: With dead ends: 2467 [2022-11-21 13:57:52,569 INFO L226 Difference]: Without dead ends: 2024 [2022-11-21 13:57:52,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:57:52,571 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 679 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:52,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 1512 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 13:57:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2022-11-21 13:57:52,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1962. [2022-11-21 13:57:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1623 states have (on average 1.2723351817621689) internal successors, (2065), 1636 states have internal predecessors, (2065), 170 states have call successors, (170), 123 states have call predecessors, (170), 167 states have return successors, (234), 203 states have call predecessors, (234), 167 states have call successors, (234) [2022-11-21 13:57:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2469 transitions. [2022-11-21 13:57:52,742 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2469 transitions. Word has length 147 [2022-11-21 13:57:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:52,742 INFO L495 AbstractCegarLoop]: Abstraction has 1962 states and 2469 transitions. [2022-11-21 13:57:52,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-21 13:57:52,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2469 transitions. [2022-11-21 13:57:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-21 13:57:52,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:52,748 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:52,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 13:57:52,748 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1913489485, now seen corresponding path program 1 times [2022-11-21 13:57:52,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:52,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424310060] [2022-11-21 13:57:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:52,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-21 13:57:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-21 13:57:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-21 13:57:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-21 13:57:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-21 13:57:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-21 13:57:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-11-21 13:57:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-21 13:57:52,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:52,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424310060] [2022-11-21 13:57:52,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424310060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:52,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:52,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:57:52,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421550454] [2022-11-21 13:57:52,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:52,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:57:52,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:52,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:57:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:57:52,917 INFO L87 Difference]: Start difference. First operand 1962 states and 2469 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-21 13:57:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:54,019 INFO L93 Difference]: Finished difference Result 3439 states and 4268 transitions. [2022-11-21 13:57:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:57:54,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2022-11-21 13:57:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:54,026 INFO L225 Difference]: With dead ends: 3439 [2022-11-21 13:57:54,027 INFO L226 Difference]: Without dead ends: 2063 [2022-11-21 13:57:54,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:57:54,030 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 604 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:54,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 1992 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 13:57:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2022-11-21 13:57:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1871. [2022-11-21 13:57:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1554 states have (on average 1.274131274131274) internal successors, (1980), 1568 states have internal predecessors, (1980), 161 states have call successors, (161), 118 states have call predecessors, (161), 154 states have return successors, (218), 185 states have call predecessors, (218), 158 states have call successors, (218) [2022-11-21 13:57:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2359 transitions. [2022-11-21 13:57:54,223 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2359 transitions. Word has length 159 [2022-11-21 13:57:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:54,223 INFO L495 AbstractCegarLoop]: Abstraction has 1871 states and 2359 transitions. [2022-11-21 13:57:54,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-21 13:57:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2359 transitions. [2022-11-21 13:57:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-21 13:57:54,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:54,228 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:54,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 13:57:54,229 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:54,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1858661205, now seen corresponding path program 1 times [2022-11-21 13:57:54,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:54,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878759335] [2022-11-21 13:57:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:54,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:57:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 13:57:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 13:57:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 13:57:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-21 13:57:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-21 13:57:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-21 13:57:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-21 13:57:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 13:57:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 13:57:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-11-21 13:57:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-21 13:57:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:57:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-21 13:57:54,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:54,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878759335] [2022-11-21 13:57:54,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878759335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:54,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438139434] [2022-11-21 13:57:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:54,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:54,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:54,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:54,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:57:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 13:57:54,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-21 13:57:54,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-21 13:57:55,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438139434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:55,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:57:55,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2022-11-21 13:57:55,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578426184] [2022-11-21 13:57:55,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:55,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 13:57:55,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 13:57:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:57:55,253 INFO L87 Difference]: Start difference. First operand 1871 states and 2359 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2022-11-21 13:57:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:56,975 INFO L93 Difference]: Finished difference Result 3843 states and 4812 transitions. [2022-11-21 13:57:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 13:57:56,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2022-11-21 13:57:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:56,983 INFO L225 Difference]: With dead ends: 3843 [2022-11-21 13:57:56,984 INFO L226 Difference]: Without dead ends: 2411 [2022-11-21 13:57:56,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 353 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2022-11-21 13:57:56,989 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 2130 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2162 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:56,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2162 Valid, 1593 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 13:57:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-11-21 13:57:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2261. [2022-11-21 13:57:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 1832 states have (on average 1.2461790393013101) internal successors, (2283), 1854 states have internal predecessors, (2283), 215 states have call successors, (215), 168 states have call predecessors, (215), 212 states have return successors, (332), 239 states have call predecessors, (332), 212 states have call successors, (332) [2022-11-21 13:57:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 2830 transitions. [2022-11-21 13:57:57,232 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 2830 transitions. Word has length 162 [2022-11-21 13:57:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:57,233 INFO L495 AbstractCegarLoop]: Abstraction has 2261 states and 2830 transitions. [2022-11-21 13:57:57,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2022-11-21 13:57:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 2830 transitions. [2022-11-21 13:57:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:57:57,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:57,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:57,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:57,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ec99e0-78e3-4644-a089-2a6f8d53d9d5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 13:57:57,445 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:57,445 INFO L85 PathProgramCache]: Analyzing trace with hash 451963073, now seen corresponding path program 1 times [2022-11-21 13:57:57,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:57,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395523921] [2022-11-21 13:57:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:57,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:57,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:57:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:57,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:57:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:57,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:57:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:57,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:57:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:57,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:57:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:57,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:57,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395523921] [2022-11-21 13:57:57,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395523921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:57,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:57,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:57:57,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357403457] [2022-11-21 13:57:57,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:57,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:57:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:57:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:57:57,624 INFO L87 Difference]: Start difference. First operand 2261 states and 2830 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 13:57:59,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:59,988 INFO L93 Difference]: Finished difference Result 2705 states and 3546 transitions. [2022-11-21 13:57:59,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:57:59,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-11-21 13:57:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:59,997 INFO L225 Difference]: With dead ends: 2705 [2022-11-21 13:57:59,997 INFO L226 Difference]: Without dead ends: 2381 [2022-11-21 13:58:00,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:58:00,000 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 996 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:00,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 905 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-21 13:58:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2022-11-21 13:58:00,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2261. [2022-11-21 13:58:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 1832 states have (on average 1.2456331877729259) internal successors, (2282), 1854 states have internal predecessors, (2282), 215 states have call successors, (215), 168 states have call predecessors, (215), 212 states have return successors, (332), 239 states have call predecessors, (332), 212 states have call successors, (332) [2022-11-21 13:58:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 2829 transitions. [2022-11-21 13:58:00,403 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 2829 transitions. Word has length 157 [2022-11-21 13:58:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:00,404 INFO L495 AbstractCegarLoop]: Abstraction has 2261 states and 2829 transitions. [2022-11-21 13:58:00,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 13:58:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 2829 transitions. [2022-11-21 13:58:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:58:00,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:00,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:00,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 13:58:00,409 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:58:00,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:00,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1445016385, now seen corresponding path program 1 times [2022-11-21 13:58:00,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:00,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524454043] [2022-11-21 13:58:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:00,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:00,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:58:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:00,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:58:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:00,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:58:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:00,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:58:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:00,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:58:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:00,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:00,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524454043] [2022-11-21 13:58:00,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524454043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:00,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:00,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:58:00,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510313141] [2022-11-21 13:58:00,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:00,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:58:00,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:00,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:58:00,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:58:00,606 INFO L87 Difference]: Start difference. First operand 2261 states and 2829 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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) [2022-11-21 13:58:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:04,402 INFO L93 Difference]: Finished difference Result 3147 states and 4260 transitions. [2022-11-21 13:58:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 13:58:04,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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 157 [2022-11-21 13:58:04,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:04,410 INFO L225 Difference]: With dead ends: 3147 [2022-11-21 13:58:04,410 INFO L226 Difference]: Without dead ends: 2831 [2022-11-21 13:58:04,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:58:04,413 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 1562 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:04,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1589 Valid, 1520 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-21 13:58:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-11-21 13:58:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2590. [2022-11-21 13:58:04,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2135 states have (on average 1.2955503512880562) internal successors, (2766), 2158 states have internal predecessors, (2766), 234 states have call successors, (234), 174 states have call predecessors, (234), 219 states have return successors, (354), 258 states have call predecessors, (354), 231 states have call successors, (354) [2022-11-21 13:58:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 3354 transitions. [2022-11-21 13:58:04,868 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 3354 transitions. Word has length 157 [2022-11-21 13:58:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:04,869 INFO L495 AbstractCegarLoop]: Abstraction has 2590 states and 3354 transitions. [2022-11-21 13:58:04,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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) [2022-11-21 13:58:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 3354 transitions. [2022-11-21 13:58:04,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:58:04,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:04,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:04,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 13:58:04,875 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:58:04,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:04,875 INFO L85 PathProgramCache]: Analyzing trace with hash -778981189, now seen corresponding path program 1 times [2022-11-21 13:58:04,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:04,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334794395] [2022-11-21 13:58:04,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:04,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:04,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:58:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:05,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:58:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:05,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:58:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:05,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:58:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:05,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:58:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:05,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:05,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334794395] [2022-11-21 13:58:05,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334794395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:05,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:05,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:58:05,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325047590] [2022-11-21 13:58:05,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:05,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:58:05,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:58:05,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:58:05,130 INFO L87 Difference]: Start difference. First operand 2590 states and 3354 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:09,587 INFO L93 Difference]: Finished difference Result 3940 states and 5536 transitions. [2022-11-21 13:58:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:58:09,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-11-21 13:58:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:09,596 INFO L225 Difference]: With dead ends: 3940 [2022-11-21 13:58:09,596 INFO L226 Difference]: Without dead ends: 3295 [2022-11-21 13:58:09,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:58:09,600 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 1585 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 3316 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 2471 SdHoareTripleChecker+Invalid, 3413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:09,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 2471 Invalid, 3413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3316 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-21 13:58:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2022-11-21 13:58:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2896. [2022-11-21 13:58:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2415 states have (on average 1.3267080745341615) internal successors, (3204), 2439 states have internal predecessors, (3204), 253 states have call successors, (253), 180 states have call predecessors, (253), 226 states have return successors, (375), 278 states have call predecessors, (375), 250 states have call successors, (375) [2022-11-21 13:58:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 3832 transitions. [2022-11-21 13:58:09,944 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 3832 transitions. Word has length 157 [2022-11-21 13:58:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:09,944 INFO L495 AbstractCegarLoop]: Abstraction has 2896 states and 3832 transitions. [2022-11-21 13:58:09,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 3832 transitions. [2022-11-21 13:58:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:58:09,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:09,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:09,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 13:58:09,950 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:58:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash 619972413, now seen corresponding path program 1 times [2022-11-21 13:58:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597838101] [2022-11-21 13:58:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:09,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:10,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:58:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:10,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:58:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:10,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:58:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:10,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:58:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:10,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:58:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:10,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:10,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597838101] [2022-11-21 13:58:10,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597838101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:10,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:10,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:58:10,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412449723] [2022-11-21 13:58:10,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:10,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:58:10,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:10,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:58:10,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:58:10,197 INFO L87 Difference]: Start difference. First operand 2896 states and 3832 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:14,953 INFO L93 Difference]: Finished difference Result 5109 states and 7402 transitions. [2022-11-21 13:58:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:58:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-11-21 13:58:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:15,000 INFO L225 Difference]: With dead ends: 5109 [2022-11-21 13:58:15,001 INFO L226 Difference]: Without dead ends: 4158 [2022-11-21 13:58:15,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:58:15,006 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 1583 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 3312 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 3411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:15,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 2469 Invalid, 3411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3312 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-21 13:58:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2022-11-21 13:58:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 3509. [2022-11-21 13:58:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 2976 states have (on average 1.3713037634408602) internal successors, (4081), 3002 states have internal predecessors, (4081), 291 states have call successors, (291), 192 states have call predecessors, (291), 240 states have return successors, (421), 318 states have call predecessors, (421), 288 states have call successors, (421) [2022-11-21 13:58:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 4793 transitions. [2022-11-21 13:58:15,546 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 4793 transitions. Word has length 157 [2022-11-21 13:58:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:15,546 INFO L495 AbstractCegarLoop]: Abstraction has 3509 states and 4793 transitions. [2022-11-21 13:58:15,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 4793 transitions. [2022-11-21 13:58:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:58:15,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:15,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:15,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-21 13:58:15,553 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:58:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:15,553 INFO L85 PathProgramCache]: Analyzing trace with hash -997468037, now seen corresponding path program 1 times [2022-11-21 13:58:15,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:15,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878533156] [2022-11-21 13:58:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:15,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:15,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:58:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:15,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:58:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:15,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:58:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:15,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:58:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:15,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:58:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:15,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878533156] [2022-11-21 13:58:15,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878533156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:15,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:15,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:58:15,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136731825] [2022-11-21 13:58:15,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:15,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:58:15,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:15,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:58:15,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:58:15,813 INFO L87 Difference]: Start difference. First operand 3509 states and 4793 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:20,488 INFO L93 Difference]: Finished difference Result 7358 states and 10971 transitions. [2022-11-21 13:58:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:58:20,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-11-21 13:58:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:20,519 INFO L225 Difference]: With dead ends: 7358 [2022-11-21 13:58:20,519 INFO L226 Difference]: Without dead ends: 5794 [2022-11-21 13:58:20,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:58:20,531 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 1682 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 2949 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 3082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:20,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 1708 Invalid, 3082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2949 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-21 13:58:20,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5794 states. [2022-11-21 13:58:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5794 to 4736. [2022-11-21 13:58:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4736 states, 4099 states have (on average 1.4235179312027324) internal successors, (5835), 4129 states have internal predecessors, (5835), 367 states have call successors, (367), 216 states have call predecessors, (367), 268 states have return successors, (519), 398 states have call predecessors, (519), 364 states have call successors, (519) [2022-11-21 13:58:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4736 states to 4736 states and 6721 transitions. [2022-11-21 13:58:21,235 INFO L78 Accepts]: Start accepts. Automaton has 4736 states and 6721 transitions. Word has length 157 [2022-11-21 13:58:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:21,235 INFO L495 AbstractCegarLoop]: Abstraction has 4736 states and 6721 transitions. [2022-11-21 13:58:21,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4736 states and 6721 transitions. [2022-11-21 13:58:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:58:21,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:21,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:21,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-21 13:58:21,242 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:58:21,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:21,243 INFO L85 PathProgramCache]: Analyzing trace with hash -634001539, now seen corresponding path program 1 times [2022-11-21 13:58:21,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:21,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145461200] [2022-11-21 13:58:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:21,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:21,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:58:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:21,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:58:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:21,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:58:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:21,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:58:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:21,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:58:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:21,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:21,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145461200] [2022-11-21 13:58:21,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145461200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:21,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:21,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:58:21,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771489693] [2022-11-21 13:58:21,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:21,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:58:21,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:21,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:58:21,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:58:21,477 INFO L87 Difference]: Start difference. First operand 4736 states and 6721 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:27,006 INFO L93 Difference]: Finished difference Result 11855 states and 18125 transitions. [2022-11-21 13:58:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:58:27,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-11-21 13:58:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:27,034 INFO L225 Difference]: With dead ends: 11855 [2022-11-21 13:58:27,034 INFO L226 Difference]: Without dead ends: 9064 [2022-11-21 13:58:27,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:58:27,043 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 1575 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 3294 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:27,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1602 Valid, 2469 Invalid, 3393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3294 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-21 13:58:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2022-11-21 13:58:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 7195. [2022-11-21 13:58:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7195 states, 6350 states have (on average 1.4722834645669292) internal successors, (9349), 6388 states have internal predecessors, (9349), 519 states have call successors, (519), 264 states have call predecessors, (519), 324 states have return successors, (733), 558 states have call predecessors, (733), 516 states have call successors, (733) [2022-11-21 13:58:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 10601 transitions. [2022-11-21 13:58:27,992 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 10601 transitions. Word has length 157 [2022-11-21 13:58:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:27,992 INFO L495 AbstractCegarLoop]: Abstraction has 7195 states and 10601 transitions. [2022-11-21 13:58:27,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 10601 transitions. [2022-11-21 13:58:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:58:28,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:28,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:28,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-21 13:58:28,002 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:58:28,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:28,002 INFO L85 PathProgramCache]: Analyzing trace with hash -345182149, now seen corresponding path program 1 times [2022-11-21 13:58:28,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:28,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088016212] [2022-11-21 13:58:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:28,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:28,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:58:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:28,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:58:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:28,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:58:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:28,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:58:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:28,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:58:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:28,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:28,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088016212] [2022-11-21 13:58:28,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088016212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:28,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:28,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:58:28,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982336047] [2022-11-21 13:58:28,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:28,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:58:28,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:28,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:58:28,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:58:28,210 INFO L87 Difference]: Start difference. First operand 7195 states and 10601 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:31,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:31,330 INFO L93 Difference]: Finished difference Result 14402 states and 22250 transitions. [2022-11-21 13:58:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:58:31,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-11-21 13:58:31,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:31,359 INFO L225 Difference]: With dead ends: 14402 [2022-11-21 13:58:31,360 INFO L226 Difference]: Without dead ends: 9152 [2022-11-21 13:58:31,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:58:31,373 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1402 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:31,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1430 Valid, 1150 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-21 13:58:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2022-11-21 13:58:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 7195. [2022-11-21 13:58:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7195 states, 6350 states have (on average 1.4696062992125984) internal successors, (9332), 6388 states have internal predecessors, (9332), 519 states have call successors, (519), 264 states have call predecessors, (519), 324 states have return successors, (733), 558 states have call predecessors, (733), 516 states have call successors, (733) [2022-11-21 13:58:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 10584 transitions. [2022-11-21 13:58:32,605 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 10584 transitions. Word has length 157 [2022-11-21 13:58:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:32,606 INFO L495 AbstractCegarLoop]: Abstraction has 7195 states and 10584 transitions. [2022-11-21 13:58:32,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 10584 transitions. [2022-11-21 13:58:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:58:32,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:32,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:32,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-21 13:58:32,615 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:58:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash -890054723, now seen corresponding path program 1 times [2022-11-21 13:58:32,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:32,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116461093] [2022-11-21 13:58:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:32,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:32,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:58:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:32,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:58:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:32,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:58:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:32,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:58:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:58:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:32,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:32,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116461093] [2022-11-21 13:58:32,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116461093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:32,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:32,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:58:32,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010945133] [2022-11-21 13:58:32,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:58:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:58:32,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:58:32,862 INFO L87 Difference]: Start difference. First operand 7195 states and 10584 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:36,340 INFO L93 Difference]: Finished difference Result 14367 states and 22130 transitions. [2022-11-21 13:58:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:58:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-11-21 13:58:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:36,371 INFO L225 Difference]: With dead ends: 14367 [2022-11-21 13:58:36,371 INFO L226 Difference]: Without dead ends: 9117 [2022-11-21 13:58:36,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:58:36,385 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1204 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:36,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 1379 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 13:58:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9117 states. [2022-11-21 13:58:37,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9117 to 7195. [2022-11-21 13:58:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7195 states, 6350 states have (on average 1.4669291338582677) internal successors, (9315), 6388 states have internal predecessors, (9315), 519 states have call successors, (519), 264 states have call predecessors, (519), 324 states have return successors, (733), 558 states have call predecessors, (733), 516 states have call successors, (733) [2022-11-21 13:58:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 10567 transitions. [2022-11-21 13:58:37,504 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 10567 transitions. Word has length 157 [2022-11-21 13:58:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:37,505 INFO L495 AbstractCegarLoop]: Abstraction has 7195 states and 10567 transitions. [2022-11-21 13:58:37,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 10567 transitions. [2022-11-21 13:58:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:58:37,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:37,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:37,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-21 13:58:37,512 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:58:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:37,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1838106689, now seen corresponding path program 1 times [2022-11-21 13:58:37,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:37,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110010392] [2022-11-21 13:58:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:37,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:37,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:58:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:37,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:58:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:37,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:58:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:37,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:58:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:37,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:58:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:37,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:37,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110010392] [2022-11-21 13:58:37,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110010392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:37,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:37,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:58:37,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017312407] [2022-11-21 13:58:37,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:37,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:58:37,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:58:37,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:58:37,734 INFO L87 Difference]: Start difference. First operand 7195 states and 10567 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:44,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:44,295 INFO L93 Difference]: Finished difference Result 20795 states and 32221 transitions. [2022-11-21 13:58:44,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:58:44,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-11-21 13:58:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:44,350 INFO L225 Difference]: With dead ends: 20795 [2022-11-21 13:58:44,350 INFO L226 Difference]: Without dead ends: 15545 [2022-11-21 13:58:44,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:58:44,365 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 1562 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 3212 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:44,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1589 Valid, 2469 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3212 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-21 13:58:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15545 states. [2022-11-21 13:58:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15545 to 12176. [2022-11-21 13:58:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 10915 states have (on average 1.5023362345396243) internal successors, (16398), 10969 states have internal predecessors, (16398), 823 states have call successors, (823), 360 states have call predecessors, (823), 436 states have return successors, (1215), 878 states have call predecessors, (1215), 820 states have call successors, (1215) [2022-11-21 13:58:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 18436 transitions. [2022-11-21 13:58:46,108 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 18436 transitions. Word has length 157 [2022-11-21 13:58:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:46,108 INFO L495 AbstractCegarLoop]: Abstraction has 12176 states and 18436 transitions. [2022-11-21 13:58:46,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 18436 transitions. [2022-11-21 13:58:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:58:46,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:46,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:46,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-21 13:58:46,118 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:58:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1872088957, now seen corresponding path program 1 times [2022-11-21 13:58:46,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:46,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583211242] [2022-11-21 13:58:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:46,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:46,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:58:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:46,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:58:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:46,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:58:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:46,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:58:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:46,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:58:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:46,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:46,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583211242] [2022-11-21 13:58:46,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583211242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:46,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:46,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:58:46,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377480821] [2022-11-21 13:58:46,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:46,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:58:46,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:58:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:58:46,334 INFO L87 Difference]: Start difference. First operand 12176 states and 18436 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:51,079 INFO L93 Difference]: Finished difference Result 25941 states and 40627 transitions. [2022-11-21 13:58:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:58:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-11-21 13:58:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:51,135 INFO L225 Difference]: With dead ends: 25941 [2022-11-21 13:58:51,136 INFO L226 Difference]: Without dead ends: 15710 [2022-11-21 13:58:51,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:58:51,158 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1203 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:51,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1231 Valid, 1379 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-21 13:58:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15710 states. [2022-11-21 13:58:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15710 to 12176. [2022-11-21 13:58:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 10915 states have (on average 1.4993128721942282) internal successors, (16365), 10969 states have internal predecessors, (16365), 823 states have call successors, (823), 360 states have call predecessors, (823), 436 states have return successors, (1215), 878 states have call predecessors, (1215), 820 states have call successors, (1215) [2022-11-21 13:58:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 18403 transitions. [2022-11-21 13:58:53,084 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 18403 transitions. Word has length 157 [2022-11-21 13:58:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:53,085 INFO L495 AbstractCegarLoop]: Abstraction has 12176 states and 18403 transitions. [2022-11-21 13:58:53,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:58:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 18403 transitions. [2022-11-21 13:58:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:58:53,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:53,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:53,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-21 13:58:53,094 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:58:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:53,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1437583359, now seen corresponding path program 1 times [2022-11-21 13:58:53,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:53,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769856046] [2022-11-21 13:58:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:53,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:53,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:58:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:53,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:58:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:53,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:58:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:53,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:58:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:53,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:58:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:58:53,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:53,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769856046] [2022-11-21 13:58:53,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769856046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:53,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:53,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:58:53,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423104850] [2022-11-21 13:58:53,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:53,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:58:53,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:53,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:58:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:58:53,310 INFO L87 Difference]: Start difference. First operand 12176 states and 18403 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:59:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:02,035 INFO L93 Difference]: Finished difference Result 38750 states and 60730 transitions. [2022-11-21 13:59:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:59:02,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-11-21 13:59:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:02,139 INFO L225 Difference]: With dead ends: 38750 [2022-11-21 13:59:02,140 INFO L226 Difference]: Without dead ends: 28519 [2022-11-21 13:59:02,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:59:02,174 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 1554 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 3174 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1581 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:59:02,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1581 Valid, 2469 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3174 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-21 13:59:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28519 states. [2022-11-21 13:59:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28519 to 22196. [2022-11-21 13:59:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22196 states, 20103 states have (on average 1.5205193254738099) internal successors, (30567), 20189 states have internal predecessors, (30567), 1431 states have call successors, (1431), 552 states have call predecessors, (1431), 660 states have return successors, (2341), 1518 states have call predecessors, (2341), 1428 states have call successors, (2341) [2022-11-21 13:59:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22196 states to 22196 states and 34339 transitions. [2022-11-21 13:59:05,504 INFO L78 Accepts]: Start accepts. Automaton has 22196 states and 34339 transitions. Word has length 157 [2022-11-21 13:59:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:05,504 INFO L495 AbstractCegarLoop]: Abstraction has 22196 states and 34339 transitions. [2022-11-21 13:59:05,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:59:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 22196 states and 34339 transitions. [2022-11-21 13:59:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:59:05,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:05,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:05,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-21 13:59:05,517 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:59:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:05,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1007925053, now seen corresponding path program 1 times [2022-11-21 13:59:05,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:05,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958778826] [2022-11-21 13:59:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:05,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:05,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:59:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:05,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:59:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:59:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:05,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:59:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:05,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:59:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:05,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:05,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958778826] [2022-11-21 13:59:05,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958778826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:59:05,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:59:05,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:59:05,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992407260] [2022-11-21 13:59:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:59:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:59:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:59:05,771 INFO L87 Difference]: Start difference. First operand 22196 states and 34339 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:59:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:23,791 INFO L93 Difference]: Finished difference Result 84260 states and 133206 transitions. [2022-11-21 13:59:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 13:59:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-11-21 13:59:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:24,167 INFO L225 Difference]: With dead ends: 84260 [2022-11-21 13:59:24,167 INFO L226 Difference]: Without dead ends: 64009 [2022-11-21 13:59:24,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-21 13:59:24,221 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 1746 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 3503 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 3636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:59:24,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 1704 Invalid, 3636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3503 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-21 13:59:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64009 states. [2022-11-21 13:59:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64009 to 42105. [2022-11-21 13:59:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42105 states, 38412 states have (on average 1.534234093512444) internal successors, (58933), 38562 states have internal predecessors, (58933), 2583 states have call successors, (2583), 936 states have call predecessors, (2583), 1108 states have return successors, (5015), 2734 states have call predecessors, (5015), 2580 states have call successors, (5015) [2022-11-21 13:59:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42105 states to 42105 states and 66531 transitions. [2022-11-21 13:59:31,658 INFO L78 Accepts]: Start accepts. Automaton has 42105 states and 66531 transitions. Word has length 157 [2022-11-21 13:59:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:31,659 INFO L495 AbstractCegarLoop]: Abstraction has 42105 states and 66531 transitions. [2022-11-21 13:59:31,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-11-21 13:59:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 42105 states and 66531 transitions. [2022-11-21 13:59:31,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:59:31,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:31,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:31,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-21 13:59:31,673 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:59:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:31,673 INFO L85 PathProgramCache]: Analyzing trace with hash 301328447, now seen corresponding path program 1 times [2022-11-21 13:59:31,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:31,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480792372] [2022-11-21 13:59:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:31,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:31,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:59:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:31,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 13:59:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:32,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-21 13:59:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:32,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 13:59:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:32,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 13:59:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:32,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480792372] [2022-11-21 13:59:32,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480792372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:59:32,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:59:32,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:59:32,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200118234] [2022-11-21 13:59:32,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:32,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:59:32,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:32,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:59:32,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:59:32,071 INFO L87 Difference]: Start difference. First operand 42105 states and 66531 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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)