./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8 --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 fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 --- 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-2329fc7 [2022-12-13 16:49:48,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:49:48,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:49:49,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:49:49,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:49:49,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:49:49,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:49:49,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:49:49,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:49:49,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:49:49,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:49:49,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:49:49,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:49:49,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:49:49,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:49:49,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:49:49,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:49:49,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:49:49,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:49:49,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:49:49,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:49:49,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:49:49,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:49:49,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:49:49,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:49:49,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:49:49,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:49:49,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:49:49,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:49:49,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:49:49,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:49:49,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:49:49,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:49:49,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:49:49,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:49:49,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:49:49,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:49:49,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:49:49,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:49:49,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:49:49,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:49:49,050 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:49:49,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:49:49,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:49:49,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:49:49,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:49:49,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:49:49,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:49:49,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:49:49,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:49:49,073 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:49:49,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:49:49,073 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:49:49,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:49:49,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:49:49,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:49:49,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:49:49,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:49:49,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:49:49,075 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:49:49,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:49:49,075 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:49:49,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:49:49,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:49:49,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:49:49,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:49:49,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:49:49,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:49:49,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:49:49,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:49:49,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:49:49,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:49:49,077 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:49:49,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:49:49,077 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:49:49,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:49:49,078 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:49:49,078 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 [2022-12-13 16:49:49,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:49:49,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:49:49,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:49:49,273 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:49:49,274 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:49:49,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-12-13 16:49:51,793 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:49:51,936 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:49:51,937 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-12-13 16:49:51,941 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/data/e946bd6a0/98c56ab53b8947aba7e74ec98bdfb6ef/FLAG21be1458d [2022-12-13 16:49:52,363 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/data/e946bd6a0/98c56ab53b8947aba7e74ec98bdfb6ef [2022-12-13 16:49:52,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:49:52,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:49:52,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:49:52,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:49:52,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:49:52,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128935d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52, skipping insertion in model container [2022-12-13 16:49:52,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:49:52,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:49:52,488 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_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2022-12-13 16:49:52,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:49:52,509 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:49:52,517 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_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2022-12-13 16:49:52,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:49:52,533 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:49:52,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52 WrapperNode [2022-12-13 16:49:52,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:49:52,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:49:52,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:49:52,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:49:52,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,557 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-12-13 16:49:52,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:49:52,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:49:52,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:49:52,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:49:52,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,571 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:49:52,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:49:52,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:49:52,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:49:52,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (1/1) ... [2022-12-13 16:49:52,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:49:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:49:52,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:49:52,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 16:49:52,629 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 16:49:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:49:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:49:52,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:49:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 16:49:52,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 16:49:52,690 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:49:52,693 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:49:52,819 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:49:52,824 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:49:52,824 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 16:49:52,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:49:52 BoogieIcfgContainer [2022-12-13 16:49:52,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:49:52,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:49:52,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:49:52,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:49:52,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:49:52" (1/3) ... [2022-12-13 16:49:52,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17429b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:49:52, skipping insertion in model container [2022-12-13 16:49:52,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:49:52" (2/3) ... [2022-12-13 16:49:52,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17429b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:49:52, skipping insertion in model container [2022-12-13 16:49:52,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:49:52" (3/3) ... [2022-12-13 16:49:52,832 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2022-12-13 16:49:52,847 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:49:52,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:49:52,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:49:52,892 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;@191a664a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:49:52,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 16:49:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 16:49:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 16:49:52,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:49:52,903 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:49:52,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:49:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:49:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2022-12-13 16:49:52,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:49:52,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001510019] [2022-12-13 16:49:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:52,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:49:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:49:53,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:49:53,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001510019] [2022-12-13 16:49:53,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 16:49:53,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214449347] [2022-12-13 16:49:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:53,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:53,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:49:53,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:49:53,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:49:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:49:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 16:49:53,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:49:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-13 16:49:53,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:49:53,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214449347] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:49:53,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:49:53,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:49:53,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191469398] [2022-12-13 16:49:53,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:49:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 16:49:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:49:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 16:49:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 16:49:53,150 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 16:49:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:49:53,169 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2022-12-13 16:49:53,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 16:49:53,170 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-12-13 16:49:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:49:53,177 INFO L225 Difference]: With dead ends: 67 [2022-12-13 16:49:53,177 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 16:49:53,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 16:49:53,184 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:49:53,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:49:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 16:49:53,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-13 16:49:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:49:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-12-13 16:49:53,235 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-12-13 16:49:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:49:53,236 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-12-13 16:49:53,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 16:49:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-12-13 16:49:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 16:49:53,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:49:53,237 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:49:53,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:49:53,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 16:49:53,440 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:49:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:49:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2022-12-13 16:49:53,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:49:53,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035190220] [2022-12-13 16:49:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:53,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:49:53,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:49:53,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951499481] [2022-12-13 16:49:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:53,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:53,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:49:53,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:49:53,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:49:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:49:53,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 16:49:53,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:49:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:49:53,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:49:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:49:53,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:49:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035190220] [2022-12-13 16:49:53,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:49:53,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951499481] [2022-12-13 16:49:53,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951499481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:49:53,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:49:53,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-12-13 16:49:53,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252779446] [2022-12-13 16:49:53,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:49:53,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:49:53,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:49:53,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:49:53,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:49:53,842 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 16:49:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:49:53,943 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-12-13 16:49:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:49:53,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-12-13 16:49:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:49:53,944 INFO L225 Difference]: With dead ends: 48 [2022-12-13 16:49:53,944 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 16:49:53,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:49:53,946 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:49:53,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:49:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 16:49:53,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-12-13 16:49:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:49:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-12-13 16:49:53,953 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2022-12-13 16:49:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:49:53,954 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-12-13 16:49:53,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 16:49:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-12-13 16:49:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 16:49:53,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:49:53,955 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:49:53,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:49:54,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:54,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:49:54,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:49:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2022-12-13 16:49:54,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:49:54,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673482233] [2022-12-13 16:49:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:54,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:49:54,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:49:54,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527169219] [2022-12-13 16:49:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:54,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:54,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:49:54,215 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:49:54,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:49:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:49:54,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:49:54,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:49:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:49:54,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:49:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-13 16:49:54,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:49:54,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673482233] [2022-12-13 16:49:54,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:49:54,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527169219] [2022-12-13 16:49:54,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527169219] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 16:49:54,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:49:54,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-12-13 16:49:54,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649944568] [2022-12-13 16:49:54,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:49:54,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:49:54,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:49:54,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:49:54,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:49:54,543 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 16:49:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:49:54,584 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-12-13 16:49:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:49:54,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-12-13 16:49:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:49:54,585 INFO L225 Difference]: With dead ends: 39 [2022-12-13 16:49:54,585 INFO L226 Difference]: Without dead ends: 37 [2022-12-13 16:49:54,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:49:54,586 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:49:54,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:49:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-13 16:49:54,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-13 16:49:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:49:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-12-13 16:49:54,593 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2022-12-13 16:49:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:49:54,593 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-12-13 16:49:54,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 16:49:54,593 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-12-13 16:49:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 16:49:54,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:49:54,595 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-12-13 16:49:54,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:49:54,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:54,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:49:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:49:54,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2022-12-13 16:49:54,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:49:54,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218807368] [2022-12-13 16:49:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:54,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:49:54,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:49:54,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912069703] [2022-12-13 16:49:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:54,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:54,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:49:54,846 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:49:54,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:49:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:49:54,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 16:49:54,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:49:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 16:49:55,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:49:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-13 16:49:55,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:49:55,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218807368] [2022-12-13 16:49:55,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:49:55,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912069703] [2022-12-13 16:49:55,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912069703] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 16:49:55,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:49:55,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-12-13 16:49:55,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058164754] [2022-12-13 16:49:55,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:49:55,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:49:55,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:49:55,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:49:55,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:49:55,157 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 16:49:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:49:55,211 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-12-13 16:49:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:49:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 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 46 [2022-12-13 16:49:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:49:55,212 INFO L225 Difference]: With dead ends: 50 [2022-12-13 16:49:55,212 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 16:49:55,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:49:55,214 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:49:55,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:49:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 16:49:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-12-13 16:49:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 16:49:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-12-13 16:49:55,227 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2022-12-13 16:49:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:49:55,228 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-12-13 16:49:55,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 16:49:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-12-13 16:49:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 16:49:55,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:49:55,229 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-12-13 16:49:55,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:49:55,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:55,430 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:49:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:49:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2022-12-13 16:49:55,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:49:55,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609380458] [2022-12-13 16:49:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:55,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:49:55,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:49:55,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645833174] [2022-12-13 16:49:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:55,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:55,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:49:55,465 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:49:55,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:49:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:49:55,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 16:49:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:49:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-13 16:49:55,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:49:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 16:49:55,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:49:55,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609380458] [2022-12-13 16:49:55,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:49:55,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645833174] [2022-12-13 16:49:55,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645833174] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 16:49:55,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:49:55,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-12-13 16:49:55,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179353684] [2022-12-13 16:49:55,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:49:55,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:49:55,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:49:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:49:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:49:55,753 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 16:49:55,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:49:55,810 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-12-13 16:49:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:49:55,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-12-13 16:49:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:49:55,812 INFO L225 Difference]: With dead ends: 54 [2022-12-13 16:49:55,812 INFO L226 Difference]: Without dead ends: 52 [2022-12-13 16:49:55,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:49:55,813 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:49:55,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:49:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-13 16:49:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-12-13 16:49:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 16:49:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-12-13 16:49:55,821 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2022-12-13 16:49:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:49:55,821 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-12-13 16:49:55,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 16:49:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-12-13 16:49:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 16:49:55,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:49:55,822 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:49:55,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:49:56,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:56,023 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:49:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:49:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2022-12-13 16:49:56,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:49:56,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914230305] [2022-12-13 16:49:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:56,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:49:56,050 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:49:56,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591994839] [2022-12-13 16:49:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:56,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:56,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:49:56,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:49:56,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:49:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:49:56,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 16:49:56,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:49:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 16:49:56,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:49:56,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:49:56,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914230305] [2022-12-13 16:49:56,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:49:56,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591994839] [2022-12-13 16:49:56,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591994839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:49:56,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:49:56,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-12-13 16:49:56,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804167594] [2022-12-13 16:49:56,502 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 16:49:56,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 16:49:56,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:49:56,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 16:49:56,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:49:56,503 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-13 16:49:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:49:56,670 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-12-13 16:49:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:49:56,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2022-12-13 16:49:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:49:56,671 INFO L225 Difference]: With dead ends: 60 [2022-12-13 16:49:56,671 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 16:49:56,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-12-13 16:49:56,672 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:49:56,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 97 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:49:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 16:49:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-12-13 16:49:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 16:49:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-12-13 16:49:56,680 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2022-12-13 16:49:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:49:56,681 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-12-13 16:49:56,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-13 16:49:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-12-13 16:49:56,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 16:49:56,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:49:56,682 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2022-12-13 16:49:56,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:49:56,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 16:49:56,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:49:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:49:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2022-12-13 16:49:56,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:49:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507354953] [2022-12-13 16:49:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:56,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:49:56,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:49:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303433417] [2022-12-13 16:49:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:56,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:56,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:49:56,924 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:49:56,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:49:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:49:57,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:49:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:49:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 16:49:57,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:49:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 16:49:57,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:49:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507354953] [2022-12-13 16:49:57,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:49:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303433417] [2022-12-13 16:49:57,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303433417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:49:57,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:49:57,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-12-13 16:49:57,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897375081] [2022-12-13 16:49:57,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:49:57,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 16:49:57,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:49:57,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 16:49:57,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:49:57,163 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 16:49:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:49:57,330 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2022-12-13 16:49:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:49:57,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2022-12-13 16:49:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:49:57,332 INFO L225 Difference]: With dead ends: 102 [2022-12-13 16:49:57,332 INFO L226 Difference]: Without dead ends: 94 [2022-12-13 16:49:57,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:49:57,333 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:49:57,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:49:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-13 16:49:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-12-13 16:49:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-13 16:49:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2022-12-13 16:49:57,354 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2022-12-13 16:49:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:49:57,354 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2022-12-13 16:49:57,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 16:49:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2022-12-13 16:49:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 16:49:57,355 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:49:57,355 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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] [2022-12-13 16:49:57,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:49:57,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:57,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:49:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:49:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2022-12-13 16:49:57,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:49:57,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731860509] [2022-12-13 16:49:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:57,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:49:57,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:49:57,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103266205] [2022-12-13 16:49:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:57,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:57,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:49:57,566 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:49:57,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:49:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:49:57,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 16:49:57,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:49:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-13 16:49:57,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:49:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-13 16:49:57,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:49:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731860509] [2022-12-13 16:49:57,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:49:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103266205] [2022-12-13 16:49:57,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103266205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:49:57,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:49:57,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2022-12-13 16:49:57,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008233362] [2022-12-13 16:49:57,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:49:57,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 16:49:57,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:49:57,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 16:49:57,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-13 16:49:57,854 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-12-13 16:49:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:49:58,246 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2022-12-13 16:49:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 16:49:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2022-12-13 16:49:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:49:58,248 INFO L225 Difference]: With dead ends: 128 [2022-12-13 16:49:58,248 INFO L226 Difference]: Without dead ends: 124 [2022-12-13 16:49:58,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:49:58,249 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:49:58,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 203 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 16:49:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-12-13 16:49:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2022-12-13 16:49:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-12-13 16:49:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-12-13 16:49:58,272 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2022-12-13 16:49:58,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:49:58,272 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-12-13 16:49:58,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-12-13 16:49:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-12-13 16:49:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-13 16:49:58,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:49:58,273 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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] [2022-12-13 16:49:58,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:49:58,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:58,474 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:49:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:49:58,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2022-12-13 16:49:58,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:49:58,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82545702] [2022-12-13 16:49:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:49:58,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:49:58,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:49:58,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835963422] [2022-12-13 16:49:58,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:49:58,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:49:58,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:49:58,483 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:49:58,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:49:58,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:49:58,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:49:58,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 16:49:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:49:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-13 16:49:58,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:50:03,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:50:03,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82545702] [2022-12-13 16:50:03,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:50:03,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835963422] [2022-12-13 16:50:03,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835963422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:50:03,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:50:03,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-12-13 16:50:03,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678153656] [2022-12-13 16:50:03,158 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 16:50:03,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 16:50:03,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:50:03,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 16:50:03,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=316, Unknown=1, NotChecked=0, Total=380 [2022-12-13 16:50:03,159 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 16:50:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:50:03,738 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2022-12-13 16:50:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 16:50:03,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 76 [2022-12-13 16:50:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:50:03,740 INFO L225 Difference]: With dead ends: 124 [2022-12-13 16:50:03,740 INFO L226 Difference]: Without dead ends: 122 [2022-12-13 16:50:03,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=80, Invalid=425, Unknown=1, NotChecked=0, Total=506 [2022-12-13 16:50:03,741 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 16:50:03,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 146 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 16:50:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-13 16:50:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2022-12-13 16:50:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 68 states have internal predecessors, (77), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-12-13 16:50:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2022-12-13 16:50:03,762 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 76 [2022-12-13 16:50:03,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:50:03,762 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2022-12-13 16:50:03,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 16:50:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2022-12-13 16:50:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 16:50:03,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:50:03,763 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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] [2022-12-13 16:50:03,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:50:03,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:50:03,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:50:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:50:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2022-12-13 16:50:03,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:50:03,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414971492] [2022-12-13 16:50:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:50:03,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:50:03,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:50:03,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194675764] [2022-12-13 16:50:03,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:50:03,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:50:03,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:50:03,975 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:50:03,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:50:04,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:50:04,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:50:04,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 16:50:04,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:50:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-12-13 16:50:04,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:50:04,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:50:04,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414971492] [2022-12-13 16:50:04,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:50:04,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194675764] [2022-12-13 16:50:04,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194675764] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:50:04,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:50:04,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-12-13 16:50:04,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216354475] [2022-12-13 16:50:04,569 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 16:50:04,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:50:04,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:50:04,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:50:04,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:50:04,570 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-13 16:50:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:50:05,125 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2022-12-13 16:50:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:50:05,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2022-12-13 16:50:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:50:05,126 INFO L225 Difference]: With dead ends: 128 [2022-12-13 16:50:05,126 INFO L226 Difference]: Without dead ends: 126 [2022-12-13 16:50:05,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:50:05,126 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:50:05,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 146 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 16:50:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-12-13 16:50:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-12-13 16:50:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-12-13 16:50:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2022-12-13 16:50:05,146 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2022-12-13 16:50:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:50:05,147 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2022-12-13 16:50:05,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-13 16:50:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2022-12-13 16:50:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-13 16:50:05,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:50:05,148 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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] [2022-12-13 16:50:05,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 16:50:05,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:50:05,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:50:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:50:05,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2022-12-13 16:50:05,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:50:05,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873807961] [2022-12-13 16:50:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:50:05,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:50:05,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:50:05,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399780667] [2022-12-13 16:50:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:50:05,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:50:05,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:50:05,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:50:05,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:50:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:50:05,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 16:50:05,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:50:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-12-13 16:50:05,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:50:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-12-13 16:50:06,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:50:06,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873807961] [2022-12-13 16:50:06,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:50:06,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399780667] [2022-12-13 16:50:06,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399780667] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:50:06,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:50:06,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-12-13 16:50:06,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431296061] [2022-12-13 16:50:06,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:50:06,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 16:50:06,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:50:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 16:50:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-12-13 16:50:06,456 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-13 16:50:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:50:15,873 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2022-12-13 16:50:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 16:50:15,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 87 [2022-12-13 16:50:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:50:15,875 INFO L225 Difference]: With dead ends: 208 [2022-12-13 16:50:15,875 INFO L226 Difference]: Without dead ends: 204 [2022-12-13 16:50:15,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 16:50:15,877 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 97 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-13 16:50:15,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 363 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-13 16:50:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-12-13 16:50:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2022-12-13 16:50:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 107 states have internal predecessors, (127), 79 states have call successors, (79), 14 states have call predecessors, (79), 14 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-13 16:50:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 284 transitions. [2022-12-13 16:50:15,935 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 284 transitions. Word has length 87 [2022-12-13 16:50:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:50:15,936 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 284 transitions. [2022-12-13 16:50:15,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-13 16:50:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 284 transitions. [2022-12-13 16:50:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-13 16:50:15,937 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:50:15,937 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:50:15,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 16:50:16,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 16:50:16,138 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:50:16,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:50:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1140726838, now seen corresponding path program 4 times [2022-12-13 16:50:16,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:50:16,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207430690] [2022-12-13 16:50:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:50:16,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:50:16,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:50:16,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837247730] [2022-12-13 16:50:16,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:50:16,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:50:16,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:50:16,167 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:50:16,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:50:16,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:50:16,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:50:16,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:50:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:50:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-13 16:50:16,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:50:16,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:50:16,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207430690] [2022-12-13 16:50:16,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:50:16,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837247730] [2022-12-13 16:50:16,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837247730] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:50:16,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:50:16,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:50:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595933193] [2022-12-13 16:50:16,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:50:16,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:50:16,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:50:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:50:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:50:16,263 INFO L87 Difference]: Start difference. First operand 200 states and 284 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-13 16:50:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:50:16,388 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2022-12-13 16:50:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:50:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 101 [2022-12-13 16:50:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:50:16,389 INFO L225 Difference]: With dead ends: 253 [2022-12-13 16:50:16,389 INFO L226 Difference]: Without dead ends: 181 [2022-12-13 16:50:16,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:50:16,390 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:50:16,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:50:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-12-13 16:50:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2022-12-13 16:50:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 89 states have (on average 1.146067415730337) internal successors, (102), 90 states have internal predecessors, (102), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-12-13 16:50:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2022-12-13 16:50:16,431 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 101 [2022-12-13 16:50:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:50:16,431 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2022-12-13 16:50:16,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-13 16:50:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2022-12-13 16:50:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-13 16:50:16,432 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:50:16,432 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:50:16,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 16:50:16,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 16:50:16,633 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:50:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:50:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2022-12-13 16:50:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:50:16,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502324012] [2022-12-13 16:50:16,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:50:16,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:50:16,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:50:16,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964506545] [2022-12-13 16:50:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:50:16,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:50:16,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:50:16,655 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:50:16,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 16:50:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:50:16,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 16:50:16,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:50:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-12-13 16:50:17,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:50:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-12-13 16:50:18,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:50:18,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502324012] [2022-12-13 16:50:18,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:50:18,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964506545] [2022-12-13 16:50:18,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964506545] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:50:18,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:50:18,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2022-12-13 16:50:18,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902259876] [2022-12-13 16:50:18,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:50:18,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 16:50:18,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:50:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 16:50:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:50:18,564 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-12-13 16:50:48,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:50:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:50:56,008 INFO L93 Difference]: Finished difference Result 209 states and 287 transitions. [2022-12-13 16:50:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 16:50:56,009 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 103 [2022-12-13 16:50:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:50:56,010 INFO L225 Difference]: With dead ends: 209 [2022-12-13 16:50:56,010 INFO L226 Difference]: Without dead ends: 207 [2022-12-13 16:50:56,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 16:50:56,011 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 84 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-12-13 16:50:56,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 210 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time] [2022-12-13 16:50:56,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-13 16:50:56,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2022-12-13 16:50:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 108 states have internal predecessors, (121), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2022-12-13 16:50:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 270 transitions. [2022-12-13 16:50:56,099 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 270 transitions. Word has length 103 [2022-12-13 16:50:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:50:56,099 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 270 transitions. [2022-12-13 16:50:56,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-12-13 16:50:56,099 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 270 transitions. [2022-12-13 16:50:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-13 16:50:56,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:50:56,101 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:50:56,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 16:50:56,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 16:50:56,302 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:50:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:50:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash -349873392, now seen corresponding path program 2 times [2022-12-13 16:50:56,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:50:56,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545851079] [2022-12-13 16:50:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:50:56,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:50:56,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:50:56,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872076376] [2022-12-13 16:50:56,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:50:56,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:50:56,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:50:56,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:50:56,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 16:50:56,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:50:56,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:50:56,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 16:50:56,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:50:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-12-13 16:50:56,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:50:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 57 proven. 42 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-12-13 16:50:57,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:50:57,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545851079] [2022-12-13 16:50:57,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:50:57,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872076376] [2022-12-13 16:50:57,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872076376] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:50:57,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:50:57,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2022-12-13 16:50:57,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177231280] [2022-12-13 16:50:57,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:50:57,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:50:57,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:50:57,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:50:57,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:50:57,420 INFO L87 Difference]: Start difference. First operand 197 states and 270 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-12-13 16:51:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:51:22,373 INFO L93 Difference]: Finished difference Result 278 states and 390 transitions. [2022-12-13 16:51:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 16:51:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 120 [2022-12-13 16:51:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:51:22,376 INFO L225 Difference]: With dead ends: 278 [2022-12-13 16:51:22,376 INFO L226 Difference]: Without dead ends: 276 [2022-12-13 16:51:22,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 16:51:22,377 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 108 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:51:22,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 290 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-12-13 16:51:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-12-13 16:51:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 244. [2022-12-13 16:51:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 136 states have internal predecessors, (152), 93 states have call successors, (93), 18 states have call predecessors, (93), 18 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-13 16:51:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2022-12-13 16:51:22,513 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 120 [2022-12-13 16:51:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:51:22,513 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2022-12-13 16:51:22,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-12-13 16:51:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2022-12-13 16:51:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-13 16:51:22,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:51:22,514 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:51:22,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 16:51:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:51:22,715 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:51:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:51:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 3 times [2022-12-13 16:51:22,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:51:22,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902140449] [2022-12-13 16:51:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:51:22,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:51:22,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:51:22,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110113227] [2022-12-13 16:51:22,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:51:22,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:51:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:51:22,749 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:51:22,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 16:51:22,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:51:22,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:51:22,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 16:51:22,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:51:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 81 proven. 38 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-12-13 16:51:23,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:51:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 67 proven. 29 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-12-13 16:51:23,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:51:23,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902140449] [2022-12-13 16:51:23,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:51:23,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110113227] [2022-12-13 16:51:23,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110113227] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:51:23,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:51:23,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2022-12-13 16:51:23,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005082991] [2022-12-13 16:51:23,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:51:23,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 16:51:23,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:51:23,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 16:51:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:51:23,646 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2022-12-13 16:51:25,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:51:25,490 INFO L93 Difference]: Finished difference Result 283 states and 394 transitions. [2022-12-13 16:51:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:51:25,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) Word has length 123 [2022-12-13 16:51:25,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:51:25,492 INFO L225 Difference]: With dead ends: 283 [2022-12-13 16:51:25,492 INFO L226 Difference]: Without dead ends: 281 [2022-12-13 16:51:25,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 16:51:25,493 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 51 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:51:25,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 263 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 16:51:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-12-13 16:51:25,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 248. [2022-12-13 16:51:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 139 states have internal predecessors, (155), 93 states have call successors, (93), 19 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-13 16:51:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 340 transitions. [2022-12-13 16:51:25,639 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 340 transitions. Word has length 123 [2022-12-13 16:51:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:51:25,640 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 340 transitions. [2022-12-13 16:51:25,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2022-12-13 16:51:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 340 transitions. [2022-12-13 16:51:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-13 16:51:25,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:51:25,641 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:51:25,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 16:51:25,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 16:51:25,842 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:51:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:51:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2022-12-13 16:51:25,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:51:25,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56856494] [2022-12-13 16:51:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:51:25,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:51:25,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:51:25,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337797345] [2022-12-13 16:51:25,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:51:25,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:51:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:51:25,857 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:51:25,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 16:51:25,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:51:25,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:51:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-13 16:51:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:51:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 113 proven. 94 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-12-13 16:51:26,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:51:27,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:51:27,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56856494] [2022-12-13 16:51:27,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:51:27,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337797345] [2022-12-13 16:51:27,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337797345] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:51:27,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:51:27,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-12-13 16:51:27,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460854788] [2022-12-13 16:51:27,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 16:51:27,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:51:27,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:51:27,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:51:27,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-12-13 16:51:27,810 INFO L87 Difference]: Start difference. First operand 248 states and 340 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-12-13 16:51:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:51:29,651 INFO L93 Difference]: Finished difference Result 304 states and 411 transitions. [2022-12-13 16:51:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:51:29,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 134 [2022-12-13 16:51:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:51:29,653 INFO L225 Difference]: With dead ends: 304 [2022-12-13 16:51:29,653 INFO L226 Difference]: Without dead ends: 297 [2022-12-13 16:51:29,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 16:51:29,654 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:51:29,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 299 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 16:51:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-12-13 16:51:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 291. [2022-12-13 16:51:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 162 states have internal predecessors, (181), 109 states have call successors, (109), 23 states have call predecessors, (109), 23 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-12-13 16:51:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 398 transitions. [2022-12-13 16:51:29,828 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 398 transitions. Word has length 134 [2022-12-13 16:51:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:51:29,828 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 398 transitions. [2022-12-13 16:51:29,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-12-13 16:51:29,828 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 398 transitions. [2022-12-13 16:51:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-13 16:51:29,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:51:29,829 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:51:29,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 16:51:30,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 16:51:30,031 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:51:30,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:51:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 4 times [2022-12-13 16:51:30,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:51:30,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511324974] [2022-12-13 16:51:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:51:30,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:51:30,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:51:30,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734156335] [2022-12-13 16:51:30,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:51:30,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:51:30,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:51:30,061 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:51:30,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 16:51:30,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:51:30,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:51:30,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-13 16:51:30,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:51:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 165 proven. 161 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2022-12-13 16:51:31,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:52:32,084 WARN L233 SmtUtils]: Spent 8.74s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:53:08,969 WARN L233 SmtUtils]: Spent 14.14s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:53:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 190 proven. 79 refuted. 12 times theorem prover too weak. 564 trivial. 0 not checked. [2022-12-13 16:53:11,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:53:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511324974] [2022-12-13 16:53:11,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:53:11,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734156335] [2022-12-13 16:53:11,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734156335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:53:11,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:53:11,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2022-12-13 16:53:11,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218991819] [2022-12-13 16:53:11,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:53:11,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 16:53:11,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:53:11,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 16:53:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=789, Unknown=13, NotChecked=0, Total=992 [2022-12-13 16:53:11,484 INFO L87 Difference]: Start difference. First operand 291 states and 398 transitions. Second operand has 32 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 25 states have internal predecessors, (58), 14 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 17 states have call predecessors, (48), 13 states have call successors, (48) [2022-12-13 16:53:13,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:17,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:19,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:22,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:24,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:27,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:29,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:31,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:34,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:36,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:40,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:45,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:48,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:50,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:52,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:54,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:53:56,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:54:00,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:54:02,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:55:24,296 WARN L233 SmtUtils]: Spent 1.33m on a formula simplification. DAG size of input: 88 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:55:45,390 WARN L233 SmtUtils]: Spent 18.79s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:55:47,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:55:51,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:55:53,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:56:00,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:56:03,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:57:37,680 WARN L233 SmtUtils]: Spent 1.53m on a formula simplification. DAG size of input: 87 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:57:39,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:57:41,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:57:44,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:57:46,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:57:48,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:57:51,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:57:54,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:57:56,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:57:58,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:58:01,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:58:04,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:58:06,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:58:40,566 WARN L233 SmtUtils]: Spent 32.36s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:58:51,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:58:53,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:59:29,708 WARN L233 SmtUtils]: Spent 30.66s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:59:42,942 WARN L233 SmtUtils]: Spent 7.95s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:59:44,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:59:47,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:59:50,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:59:52,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:59:55,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 16:59:59,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:00:02,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:00:04,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:00:06,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:00:08,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:00:10,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:00:20,928 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:00:25,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:00:27,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:00:53,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:00,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:02,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:04,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:06,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:08,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:10,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:12,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:48,785 WARN L233 SmtUtils]: Spent 30.06s on a formula simplification. DAG size of input: 78 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:01:50,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:53,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:55,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:01:58,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 17:04:16,224 WARN L233 SmtUtils]: Spent 2.14m on a formula simplification. DAG size of input: 112 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:04:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:04:16,257 INFO L93 Difference]: Finished difference Result 332 states and 450 transitions. [2022-12-13 17:04:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 17:04:16,257 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 25 states have internal predecessors, (58), 14 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 17 states have call predecessors, (48), 13 states have call successors, (48) Word has length 150 [2022-12-13 17:04:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:04:16,259 INFO L225 Difference]: With dead ends: 332 [2022-12-13 17:04:16,259 INFO L226 Difference]: Without dead ends: 330 [2022-12-13 17:04:16,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 281 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 563.1s TimeCoverageRelationStatistics Valid=742, Invalid=2413, Unknown=37, NotChecked=0, Total=3192 [2022-12-13 17:04:16,260 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 147 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 260 mSolverCounterUnsat, 58 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 58 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:04:16,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 265 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1510 Invalid, 58 Unknown, 0 Unchecked, 160.6s Time] [2022-12-13 17:04:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-12-13 17:04:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 319. [2022-12-13 17:04:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 175 states have (on average 1.1371428571428572) internal successors, (199), 181 states have internal predecessors, (199), 118 states have call successors, (118), 25 states have call predecessors, (118), 25 states have return successors, (117), 112 states have call predecessors, (117), 117 states have call successors, (117) [2022-12-13 17:04:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 434 transitions. [2022-12-13 17:04:16,518 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 434 transitions. Word has length 150 [2022-12-13 17:04:16,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:04:16,519 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 434 transitions. [2022-12-13 17:04:16,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 25 states have internal predecessors, (58), 14 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 17 states have call predecessors, (48), 13 states have call successors, (48) [2022-12-13 17:04:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 434 transitions. [2022-12-13 17:04:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-13 17:04:16,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:04:16,520 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:04:16,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 17:04:16,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 17:04:16,722 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:04:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:04:16,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 3 times [2022-12-13 17:04:16,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:04:16,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888413210] [2022-12-13 17:04:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:04:16,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:04:16,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:04:16,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708022176] [2022-12-13 17:04:16,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:04:16,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:04:16,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:04:16,750 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:04:16,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 17:04:16,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 17:04:16,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:04:16,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:04:16,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:04:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 99 proven. 31 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2022-12-13 17:04:17,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:04:17,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:04:17,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888413210] [2022-12-13 17:04:17,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:04:17,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708022176] [2022-12-13 17:04:17,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708022176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:04:17,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:04:17,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-12-13 17:04:17,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813830927] [2022-12-13 17:04:17,672 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 17:04:17,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:04:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:04:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:04:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:04:17,673 INFO L87 Difference]: Start difference. First operand 319 states and 434 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-13 17:04:18,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:04:18,239 INFO L93 Difference]: Finished difference Result 365 states and 497 transitions. [2022-12-13 17:04:18,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:04:18,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 153 [2022-12-13 17:04:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:04:18,241 INFO L225 Difference]: With dead ends: 365 [2022-12-13 17:04:18,241 INFO L226 Difference]: Without dead ends: 358 [2022-12-13 17:04:18,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-12-13 17:04:18,241 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:04:18,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 150 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:04:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-12-13 17:04:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 339. [2022-12-13 17:04:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 185 states have (on average 1.135135135135135) internal successors, (210), 191 states have internal predecessors, (210), 126 states have call successors, (126), 27 states have call predecessors, (126), 27 states have return successors, (125), 120 states have call predecessors, (125), 125 states have call successors, (125) [2022-12-13 17:04:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 461 transitions. [2022-12-13 17:04:18,545 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 461 transitions. Word has length 153 [2022-12-13 17:04:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:04:18,545 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 461 transitions. [2022-12-13 17:04:18,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-13 17:04:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 461 transitions. [2022-12-13 17:04:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-13 17:04:18,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:04:18,546 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:04:18,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 17:04:18,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:04:18,747 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:04:18,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:04:18,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2018058068, now seen corresponding path program 4 times [2022-12-13 17:04:18,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:04:18,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327007348] [2022-12-13 17:04:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:04:18,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:04:18,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:04:18,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489459615] [2022-12-13 17:04:18,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:04:18,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:04:18,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:04:18,755 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:04:18,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ef57be-ffea-48f8-a6a1-b19d2e258f0a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 17:04:18,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:04:18,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:04:18,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 17:04:18,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:04:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 46 proven. 76 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-12-13 17:04:19,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:04:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-12-13 17:04:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:04:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327007348] [2022-12-13 17:04:21,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:04:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489459615] [2022-12-13 17:04:21,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489459615] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:04:21,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:04:21,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-12-13 17:04:21,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959543538] [2022-12-13 17:04:21,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:04:21,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:04:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:04:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:04:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:04:21,593 INFO L87 Difference]: Start difference. First operand 339 states and 461 transitions. Second operand has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 16 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 14 states have call predecessors, (50), 14 states have call successors, (50)